Synonyms for quickly are words and phrases that describe doing something at a fast pace without repeating the same word again and again. Whether you are writing an email, chatting with friends, or polishing an article, using “quickly” too often can make your writing feel repetitive and less engaging.

I’ve found that choosing the right synonym for quickly can make a sentence sound more natural, precise, and expressive. Sometimes you need a professional alternative for a colleague, a casual phrase for a friend, or a playful expression for family and partners. Words such as rapidly, swiftly, promptly, speedily, immediately, and in a hurry can each add a slightly different meaning or tone.

In this guide, you’ll discover different ways to say quickly, along with creative alternatives, unique expressions, related phrases, better wording, and useful choices for formal and casual situations. You’ll also find options that work well in everyday conversations, professional writing, storytelling, and even funny responses.

Ready to replace repetitive wording with something more interesting? Explore the full list and find the perfect alternative for every situation.

Synonyms For “Quickly”

Rapidly

Meaning:
Rapidly means doing something at a very fast rate or within a short period. It is one of the most useful synonyms for quickly, especially when describing a noticeable change, movement, or process.

Usage Scenario:
Use rapidly in professional writing, reports, news-style content, academic discussions, and everyday explanations. It works especially well when something is developing or changing faster than expected.

Tone:
Formal, professional, neutral, and informative.

Best Use Case:
Choose rapidly when you want to emphasize the speed of progress, growth, change, or movement rather than simply telling someone to hurry.

Examples:

• Technology is rapidly changing the way businesses communicate.
• The situation rapidly improved after the team responded.
• Her writing skills have rapidly developed over the past year.
• The river level began rising rapidly after the storm.

Speedily

Meaning:
Speedily means doing something quickly and without unnecessary delay. It directly describes fast action and can replace “quickly” when you want to emphasize efficiency.

Usage Scenario:
You may see speedily in instructions, customer service communication, workplace messages, or descriptions of someone completing a task. It is less common in casual speech than “quickly” or “fast.”

Tone:
Neutral, polite, slightly formal, and efficient.

Best Use Case:
Use speedily when describing a task that should be completed without delay, especially in service or work-related contexts.

Examples:

• The support team handled my request speedily.
• Please review the document and respond speedily.
• The technician repaired the system speedily.
• We need to process these applications speedily.

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Swiftly

Meaning:
Swiftly means very quickly and smoothly. It often suggests that an action happens with confidence, decisiveness, or little hesitation.

Usage Scenario:
Swiftly works well in storytelling, professional communication, journalism, and polished writing. It can describe physical movement as well as decisions or responses.

Tone:
Professional, confident, polished, and sometimes dramatic.

Best Use Case:
Choose swiftly when you want to highlight both speed and decisive action.

Examples:

• The manager swiftly responded to the customer’s concern.
• She swiftly moved the meeting to a different time.
• The company swiftly addressed the technical issue.
• He swiftly changed his approach after receiving feedback.

Hastily

Meaning:
Hastily means doing something too quickly or with little time for careful thought. Unlike many positive alternatives to “quickly,” it can suggest that speed caused a mistake or poor decision.

Usage Scenario:
Use hastily when discussing rushed choices, unfinished work, quick decisions, or actions taken under pressure. It is common in writing where the speaker wants to point out a lack of care.

Tone:
Neutral, critical, or cautionary.

Best Use Case:
Use hastily when the speed of an action has a negative or careless implication.

Examples:

• He hastily replied without reading the entire message.
• She made a hastily written decision and later regretted it.
• Don’t hastily accept an offer without checking the details.
• The proposal was hastily prepared before the deadline.

Promptly

Meaning:
Promptly means doing something on time or without delay. It focuses less on physical speed and more on responding or acting when expected.

Usage Scenario:
Promptly is especially useful in emails, workplace communication, customer service, appointments, and professional etiquette. It signals reliability and respect for another person’s time.

Tone:
Professional, polite, responsible, and efficient.

Best Use Case:
Choose promptly when you want to emphasize a timely response, quick action, or dependable communication.

Examples:

• Please reply promptly so we can finalize the schedule.
• She promptly answered the client’s email.
• The team promptly addressed the customer’s concern.
• He arrived promptly at the scheduled meeting time.

Immediately

Meaning:
Immediately means at once, without waiting, or with no delay. It is stronger than simply saying “quickly” because it often means the action should happen right now.

Usage Scenario:
Use immediately for urgent instructions, workplace requests, emergency situations, customer support, and direct communication. It is also common in everyday conversations when something needs instant attention.

Tone:
Direct, urgent, firm, or professional depending on context.

Best Use Case:
Use immediately when an action must happen right away rather than simply happen at a fast pace.

Examples:

• Please contact the manager immediately.
• She called me immediately after receiving the news.
• The system should be restarted immediately.
• He understood the problem and took action immediately.

Hurriedly

Meaning:
Hurriedly means doing something in a rushed or hurried manner. It often suggests that someone has limited time and is trying to finish before a deadline or departure.

Usage Scenario:
This word fits storytelling, personal conversations, descriptions of busy situations, and writing about actions performed under time pressure.

Tone:
Casual, descriptive, and sometimes slightly negative.

Best Use Case:
Choose hurriedly when you want to show that someone is rushing because of limited time.

Examples:

• She hurriedly packed her bag before leaving.
• He hurriedly finished his breakfast and ran to work.
• I hurriedly checked my email before the meeting.
• They hurriedly left the building when the alarm sounded.

Briskly

Meaning:
Briskly means moving or acting quickly, energetically, and with purpose. It often describes physical movement, but it can also describe a confident manner of speaking or working.

Usage Scenario:
Use briskly in conversations about walking, working, completing routine tasks, or maintaining an energetic pace. It is common in descriptive writing and everyday English.

Tone:
Energetic, confident, active, and neutral.

Best Use Case:
Use briskly when the action is not only fast but also lively and purposeful.

Examples:

• She walked briskly to catch the train.
• The supervisor briskly explained the next steps.
• He briskly completed the morning tasks.
• We walked briskly through the park before lunch.

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Fleetly

Meaning:
Fleetly means moving very quickly and lightly. It is an uncommon and somewhat literary alternative to “quickly,” so it can make descriptive writing sound more distinctive.

Usage Scenario:
Fleetly is better suited to creative writing, poetry, storytelling, and literary descriptions than everyday workplace conversations.

Tone:
Literary, elegant, descriptive, and uncommon.

Best Use Case:
Choose fleetly when you want a unique expression for speed in creative or imaginative writing.

Examples:

• The deer moved fleetly through the forest.
• The bird flew fleetly across the open field.
• She moved fleetly toward the waiting carriage.
• The runner passed his competitors fleetly.

Expeditiously

Meaning:
Expeditiously means completing something quickly and efficiently, especially when avoiding unnecessary delay is important. It is a more formal alternative to “quickly.”

Usage Scenario:
This word commonly appears in business communication, legal writing, government documents, formal emails, and professional instructions. It can sound too formal for casual conversations.

Tone:
Formal, professional, authoritative, and businesslike.

Best Use Case:
Use expeditiously when discussing efficient task completion in a formal or professional setting.

Examples:

• The team worked expeditiously to resolve the issue.
• Please process the request expeditiously.
• The complaint was reviewed expeditiously by the department.
• We aim to complete the project expeditiously while maintaining quality.

Posthaste

Meaning:
Posthaste means doing something as quickly as possible or with great urgency. It is an old-fashioned expression that still appears occasionally in formal, humorous, or dramatic language.

Usage Scenario:
You may encounter posthaste in historical writing, literature, playful messages, dramatic instructions, or intentionally old-fashioned expressions. It is uncommon in everyday American English.

Tone:
Formal, old-fashioned, dramatic, or playful.

Best Use Case:
Use posthaste when you want a distinctive or humorous way to express urgency, rather than a normal everyday synonym.

Examples:

• The messenger was ordered to return posthaste.
• Please send the documents posthaste.
• We need to get there posthaste before the doors close.
• He rushed posthaste to the station.

In a Hurry

Meaning:
In a hurry means being short on time and needing to move or finish something quickly. It is one of the most natural conversational alternatives to “quickly.”

Usage Scenario:
This phrase works well in casual conversations, texts, social interactions, family discussions, and everyday situations. It sounds natural when talking about being rushed or having limited time.

Tone:
Casual, friendly, natural, and conversational.

Best Use Case:
Use in a hurry when speaking with friends, family, partners, or coworkers about having little time or needing to leave quickly.

Examples:

• I’m in a hurry, so I’ll call you later.
• She was in a hurry to catch the bus.
• Are you in a hurry, or can we talk for a few minutes?
• He left in a hurry because he was already late.

In Haste

Meaning:
In haste means doing something very quickly and often with little time for careful thought. It is a useful alternative to “quickly” when you want to highlight urgency or a rushed action.

Usage Scenario:
Use in haste in formal writing, storytelling, personal reflections, or situations where someone makes a decision under pressure. It can also describe rushed communication or work.

Tone:
Formal, literary, and sometimes cautionary.

Best Use Case:
Use it when speed is connected to urgency, pressure, or limited time.

Examples:

• He signed the document in haste and later noticed the error.
• She left in haste after receiving the urgent call.
• Don’t make an important decision in haste.
• The email was written in haste before the meeting.

In No Time

Meaning:
In no time means something will happen or be completed very quickly, usually much sooner than expected.

Usage Scenario:
This natural idiom works well in casual conversations, friendly messages, social interactions, and everyday speech. It can also make reassurance sound more positive.

Tone:
Friendly, casual, and reassuring.

Best Use Case:
Use in no time when you want to tell someone that something will be finished very soon.

Examples:

• I’ll finish this report in no time.
• Don’t worry, we’ll be there in no time.
• She learned the new software in no time.
• Dinner will be ready in no time.

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Without Delay

Meaning:
Without delay means doing something immediately or without waiting. It emphasizes that there should be no unnecessary pause.

Usage Scenario:
This phrase fits professional emails, workplace instructions, customer service, official notices, and formal communication.

Tone:
Formal, professional, direct, and serious.

Best Use Case:
Use without delay when giving a clear instruction or emphasizing the importance of prompt action.

Examples:

• Please contact the client without delay.
• The issue should be reported without delay.
• We need to resolve this problem without delay.
• The team responded without delay.

At Once

Meaning:
At once means immediately or right now. Depending on context, it can also mean that several things happen at the same time.

Usage Scenario:
Use it in everyday conversations, workplace communication, instructions, and situations requiring immediate attention.

Tone:
Direct, neutral, and sometimes urgent.

Best Use Case:
Choose at once when someone needs to take action immediately.

Examples:

• Please come here at once.
• She called the manager at once.
• I’ll take care of the problem at once.
• The team began working at once.

Right Away

Meaning:
Right away means immediately or very soon, without waiting. It is one of the most natural conversational alternatives to “quickly.”

Usage Scenario:
It works especially well in texts, casual conversations, customer service, workplace chats, and friendly communication.

Tone:
Casual, friendly, natural, and responsive.

Best Use Case:
Use right away when promising or describing quick action in everyday communication.

Examples:

• I’ll send the file right away.
• She replied right away.
• Let me check that for you right away.
• He knew something was wrong and called for help right away.

Straightaway

Meaning:
Straightaway means immediately or without stopping to wait. It is similar to “right away” and “at once.”

Usage Scenario:
You can use straightaway in conversation, informal writing, instructions, and British-influenced English. It is understandable in American English but less common than “right away.”

Tone:
Conversational, direct, and slightly traditional.

Best Use Case:
Use it when you want a natural way to express immediate action without sounding overly formal.

Examples:

• I’ll call her straightaway.
• He got to work straightaway.
• Please let me know straightaway if anything changes.
• She recognized the problem and fixed it straightaway.

Pronto

Meaning:
Pronto means quickly or immediately. In English, it is an informal expression often used to tell someone that something should happen without delay.

Usage Scenario:
Use pronto in casual conversations, playful workplace communication, advertisements, or humorous messages. It can sound less serious than “immediately.”

Tone:
Informal, playful, and energetic.

Best Use Case:
Use it for casual requests when you want to add a little personality to the idea of acting quickly.

Examples:

• Get over here pronto!
• I need that report pronto.
• Fix this problem pronto, please.
• We should order the tickets pronto before they sell out.

Fast

Meaning:
Fast means moving, happening, or being completed at a high rate of speed. It is one of the simplest and most common alternatives to “quickly.”

Usage Scenario:
Use fast in everyday speech, informal writing, sports, technology, travel, and descriptions of physical movement.

Tone:
Casual, simple, direct, and highly natural.

Best Use Case:
Choose fast when you need clear, everyday wording without adding a formal or literary tone.

Examples:

• She runs fast.
• We need to work fast to meet the deadline.
• The car was moving fast.
• He learned the new system fast.

Fast-Paced

Meaning:
Fast-paced describes something that happens at a quick and active rate, with frequent movement, changes, or events. It usually describes an environment, activity, lifestyle, or story rather than a single action.

Usage Scenario:
This phrase is common in job descriptions, business writing, entertainment reviews, workplace discussions, and lifestyle content.

Tone:
Professional, energetic, and descriptive.

Best Use Case:
Use fast-paced when describing a busy environment or rapidly changing situation.

Examples:

• She enjoys working in a fast-paced environment.
• The movie has a fast-paced storyline.
• Digital marketing is a fast-paced industry.
• He performs well in fast-paced workplaces.

At High Speed

Meaning:
At high speed means moving or operating at a very fast rate. It usually focuses on physical movement, machines, transportation, or technical processes.

Usage Scenario:
Use this phrase in technical explanations, transportation discussions, safety instructions, sports, and descriptions involving physical speed.

Tone:
Neutral, technical, and descriptive.

Best Use Case:
Choose at high speed when you need to describe rapid physical movement or operation.

Examples:

• The train was traveling at high speed.
• The machine operates at high speed.
• The cyclist moved at high speed down the hill.
• Avoid turning sharply while driving at high speed.

With Haste

Meaning:
With haste means doing something quickly because of urgency or limited time. It is similar to “in haste” but can sound more formal or literary.

Usage Scenario:
Use with haste in formal writing, storytelling, historical contexts, and dramatic descriptions rather than casual conversation.

Tone:
Formal, literary, and urgent.

Best Use Case:
Use it when describing an action that must be completed quickly due to pressure or urgency.

Examples:

• The message was delivered with haste.
• They prepared the supplies with haste.
• He departed with haste after hearing the news.
• The workers completed the repairs with haste.

With Speed

Meaning:
With speed means doing something quickly or at a fast rate. It is understandable but less natural in many everyday sentences than “quickly,” “swiftly,” or “at speed.”

Usage Scenario:
This phrase can appear in descriptive, technical, or formal contexts, especially when focusing on the rate at which an action occurs.

Tone:
Neutral, formal, and descriptive.

Best Use Case:
Use with speed when emphasizing the rate of movement or action, particularly in descriptive writing.

Examples:

• The vehicle moved with speed across the open road.
• The team responded with speed to the unexpected problem.
• She completed the task with speed and accuracy.
• The athlete moved with speed toward the finish line.

In Short Order

Meaning:
In short order means very soon or within a short amount of time. It often suggests that something will be completed efficiently.

Usage Scenario:
Use this idiom in professional writing, workplace conversations, news-style writing, and everyday English when describing a task completed quickly.

Tone:
Neutral, professional, and idiomatic.

Best Use Case:
Choose in short order when emphasizing efficient completion without sounding overly urgent.

Examples:

• The technician fixed the problem in short order.
• We had the meeting organized in short order.
• She finished the paperwork in short order.
• The team resolved the complaint in short order.

Before Long

Meaning:
Before long means soon or after only a short period of time. It focuses on how little time passes before something happens.

Usage Scenario:
This phrase is common in storytelling, casual conversation, personal writing, and descriptions of events that happen soon afterward.

Tone:
Natural, conversational, and slightly literary.

Best Use Case:
Use before long when describing an event that occurs soon after another event.

Examples:

• Before long, everyone was laughing together.
• She started practicing, and before long, she became confident.
• We left early, and before long, we reached the station.
• Before long, the rain finally stopped.

In an Instant

Meaning:
In an instant means something happens almost immediately or within an extremely short moment.

Usage Scenario:
It works well in storytelling, emotional descriptions, dramatic writing, and everyday speech when a sudden change happens very quickly.

Tone:
Dramatic, descriptive, and expressive.

Best Use Case:
Use in an instant when emphasizing a sudden or almost instantaneous change.

Examples:

• The lights went out in an instant.
• Her expression changed in an instant.
• The crowd became silent in an instant.
• Everything changed in an instant.

In a Flash

Meaning:
In a flash means extremely quickly or almost instantly. It is a vivid idiom that creates a strong sense of speed.

Usage Scenario:
Use it in casual conversations, storytelling, advertisements, social media captions, and descriptions of fast events.

Tone:
Casual, lively, and expressive.

Best Use Case:
Choose in a flash when you want a colorful and memorable expression for speed.

Examples:

• I’ll be back in a flash.
• The kids finished their snacks in a flash.
• She disappeared in a flash.
• The problem was solved in a flash.

In a Heartbeat

Meaning:
In a heartbeat means very quickly or without hesitation. It can also show that someone is extremely willing to do something.

Usage Scenario:
This idiom works well in casual conversations, personal relationships, social interaction, and emotional statements.

Tone:
Warm, informal, enthusiastic, and expressive.

Best Use Case:
Use it when you want to express quick action combined with strong willingness or confidence.

Examples:

• I’d help you in a heartbeat.
• She would accept the opportunity in a heartbeat.
• He agreed to join us in a heartbeat.
• I’d travel there in a heartbeat if I had the chance.

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In a Jiffy

Meaning:
In a jiffy means in a very short time. It is a friendly idiom used to reassure someone that something will not take long.

Usage Scenario:
Use it in casual speech, friendly texts, family conversations, and lighthearted social interaction. It is less suitable for formal business writing.

Tone:
Casual, friendly, and playful.

Best Use Case:
Use in a jiffy when talking informally about completing something very soon.

Examples:

• I’ll be ready in a jiffy.
• Give me a minute, and I’ll fix it in a jiffy.
• Dinner will be ready in a jiffy.
• She came back in a jiffy.

Like Lightning

Meaning:
Like lightning means moving or acting extremely quickly. It compares someone’s speed with the sudden, rapid movement associated with lightning.

Usage Scenario:
This vivid expression works well in storytelling, sports commentary, casual conversations, and creative descriptions.

Tone:
Energetic, dramatic, and informal.

Best Use Case:
Use like lightning when you want to emphasize exceptional speed in an engaging way.

Examples:

• He ran like lightning toward the finish line.
• She moved like lightning when the alarm went off.
• The goalkeeper reacted like lightning.
• The dog disappeared like lightning when the gate opened.

At Lightning Speed

Meaning:
At lightning speed means moving or operating extremely quickly. It strongly emphasizes an unusually high level of speed.

Usage Scenario:
This phrase is useful in technology, sports, advertising, storytelling, and casual descriptions of very fast actions.

Tone:
Energetic, dramatic, and descriptive.

Best Use Case:
Use it when you want to highlight exceptionally fast performance or movement.

Examples:

• The new processor works at lightning speed.
• She completed the puzzle at lightning speed.
• The athlete moved at lightning speed.
• The website loads at lightning speed.

As Soon as Possible

Meaning:
As soon as possible, often shortened to ASAP, means doing something at the earliest practical opportunity. It expresses urgency without always meaning “immediately.”

Usage Scenario:
This phrase is common in professional emails, workplace communication, customer service, project management, and everyday requests.

Tone:
Professional, direct, polite, and sometimes urgent.

Best Use Case:
Use as soon as possible when you need someone to take action promptly but want to leave reasonable room for them to complete the task.

Examples:

• Please send me the updated file as soon as possible.
• We need to discuss this issue as soon as possible.
• I’ll get back to you as soon as possible.
• Please let the team know as soon as possible if your schedule changes.

In Double Time

Meaning:
In double time means doing something very quickly or at an accelerated pace. The expression comes from a military marching term and is also used more broadly in everyday English.

Usage Scenario:
Use it in casual speech, storytelling, workplace conversations, and situations where someone needs to speed up their efforts.

Tone:
Energetic, informal, and sometimes humorous.

Best Use Case:
Choose in double time when you want to suggest moving faster than the normal pace.

Examples:

• We need to finish this project in double time.
• The team cleaned the room in double time.
• She got ready in double time after hearing the news.
• The workers completed the setup in double time.

Conclusion

Finding the right synonym for quickly can make your writing more natural, precise, and engaging. While quickly works in almost any situation, alternatives such as rapidly, swiftly, promptly, immediately, in no time, right away, and in a flash can add a clearer sense of speed, urgency, timing, or tone.

For professional writing, promptly, expeditiously, and without delay can sound polished and appropriate. For everyday conversations, phrases like right away, in a jiffy, in no time, and in a hurry feel more natural. If you want a more creative expression, like lightning or in a heartbeat can make your wording more memorable.

The best choice depends on the context, audience, and communication tone. Use these alternatives to avoid repetition and choose wording that says exactly what you mean.

FAQs About Synonyms for Quickly

What is the best synonym for quickly?

Rapidly, swiftly, speedily, promptly, and immediately are common synonyms for quickly. The best choice depends on whether you mean fast movement, quick action, or immediate action.

What is a professional synonym for quickly?

Promptly, expeditiously, without delay, and swiftly work well in professional communication. For example, “Please respond promptly” sounds clear and professional.

What is a casual way to say quickly?

Common casual alternatives include right away, in no time, in a jiffy, in a flash, and in a hurry. These phrases work naturally in texts, conversations, and social interactions.

What is another word for doing something quickly?

You can say rapidly, swiftly, speedily, briskly, hastily, or hurriedly. Each word has a slightly different meaning, so consider whether the action is efficient, rushed, energetic, or simply fast.

What is a stronger word for quickly?

Rapidly, immediately, and swiftly can provide a stronger sense of speed. For an especially vivid expression, try at lightning speed or like lightning.

What is a synonym for quickly in an email?

For a professional email introduction, request, or follow-up, useful choices include promptly, as soon as possible, without delay, and at once. “Please respond promptly” is usually more polished than simply saying “Please respond quickly.”

Is “fast” a synonym for quickly?

Yes. Fast can describe something happening at a high rate of speed and is one of the most common alternatives to quickly. For example, “She works fast” means she works quickly.

What is a creative way to say quickly?

Creative alternatives include in a flash, in a heartbeat, like lightning, at lightning speed, and in no time. These expressions can make casual writing and conversations more vivid.

What is the difference between “quickly” and “promptly”?

Quickly focuses mainly on speed, while promptly focuses on acting without unnecessary delay or at the expected time. For example, “She finished quickly” emphasizes speed, while “She replied promptly” emphasizes a timely response.

What is the difference between “quickly” and “hastily”?

Quickly simply describes speed, while hastily often suggests that someone acted too quickly or without enough thought. “He finished quickly” is neutral, while “He finished hastily” may suggest rushed or careless work.