Cool MateFast vs Hasty vs Rapid vs Speedy
When to use each in English, with meaning, register, and examples.
Fast
Hasty
Rapid
Speedy
| Fast | Hasty | Rapid | Speedy | |
|---|---|---|---|---|
| Pronunciation | 🇬🇧 /["/fɑːst/"]/🇺🇸 /["/fæst/"]/ | 🇬🇧 //ˈheɪ sti//🇺🇸 //ˈheɪsti// | 🇬🇧 //ˈræp.ɪd//🇺🇸 //ˈræp.ɪd// | 🇬🇧 //ˈspiːdi//🇺🇸 //ˈspiːdi// |
| Meaning | Moving or happening quickly. | Doing things quickly without thinking carefully. | happening very quickly | moving or happening quickly |
| Example | She runs very fast when she is late for school. | His hasty decision led to unexpected consequences. | The rapid changes in technology are hard to keep up with. | The delivery service is known for its speedy arrival times. |
| Register | Neutral | Neutral | Neutral | Neutral |
| How common | Top 1,000 (very common) | Top 5,000 (fairly common) | Top 2,000 (common) | Top 3,000 (common) |
| CEFR level | A1 | B1 | B2 | - |
| Part of speech | adjective | adjective | adjective | |
| Collocations | be, seem, extremely, fairly, very, be, seem, extremely, fairly, very | hasty decision, hasty retreat, hasty judgment | rapid response, rapid increase, rapid change | speedy delivery, speedy recovery, speedy service, speedy response |
| Antonyms | slow | slow, careful, deliberate | slow, gradual, leisurely | slow, sluggish, lethargic |
| Common mistakes | 'Fast' is sometimes confused with 'quick' improperly., Learners often forget that 'fast' can be used for both time and physical speed., Some may incorrectly add 'ly' to make it an adverb (fastly). | Confusing 'hasty' with 'hasty decision', thinking it applies only to choices., Using 'hasty' as a noun or verb instead of an adjective., Forgetting that 'hasty' implies negative connotations. | Confusing with 'quick', which implies speed but may not denote the same urgency., Using 'rapid' in contexts where a slower pace is typical. | Confusing 'speedy' with 'fast' which are often interchangeable but 'speedy' can imply efficiency., Using 'speedy' for slow processes, which is incorrect., Forget to pair 'speedy' with a noun, leading to incomplete expressions. |
| Usage notes | Use 'fast' to describe speed, but be cautious when using it with 'to' (as in 'to fast', it means to not eat for a period of time). Appropriate in both written and spoken contexts. | Use 'hasty' to describe actions taken too quickly, often leading to mistakes. It's suitable for both formal and informal contexts. Avoid using it in overly casual conversations. | Used to describe actions or changes that occur with speed. Suitable for both formal and informal contexts. | Use 'speedy' in contexts where quickness is praised. It's appropriate in both spoken and written English, but more common in informal settings. |
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Frequently asked questions: Fast vs Hasty vs Rapid vs Speedy
What's the difference between Fast, Hasty, Rapid, and Speedy?
Fast: Moving or happening quickly. Hasty: Doing things quickly without thinking carefully. Rapid: happening very quickly Speedy: moving or happening quickly
Which is more common: Fast, Hasty, Rapid, and Speedy?
Fast is the most common in everyday English.
Which is more advanced: Fast, Hasty, Rapid, and Speedy?
Rapid is the highest level, at B2, on the CEFR scale.
Can you show an example of each?
Fast: She runs very fast when she is late for school. Hasty: His hasty decision led to unexpected consequences. Rapid: The rapid changes in technology are hard to keep up with. Speedy: The delivery service is known for its speedy arrival times.
Can I use Fast, Hasty, Rapid, and Speedy interchangeably?
Not always. Fast, Hasty, Rapid, and Speedy are related and overlap in some contexts, but they differ in register, how common they are, and usage, so swapping one for another can change the meaning or tone. Check the differences above before substituting.