Cool MateCaution vs Fair warning
When to use each in English, with meaning, register, and examples.
Caution
Top 2,000 (common)C1noun
Fair warning
Beyond 10,000 (less common)
Most common: Caution
| Caution | Fair warning | |
|---|---|---|
| Pronunciation | 🇬🇧 /["/ˈkɔːʃn/"]/🇺🇸 /["/ˈkɔːʃn/"]/ | 🇬🇧 //fɛə ˈwɔːnɪŋ//🇺🇸 //fɛr ˈwɔrnɪŋ// |
| Meaning | Be careful. | A heads-up about something to expect in the future. |
| Example | Caution is advised when driving in heavy rain. | She gave me a fair warning about the difficult exam coming up next week. |
| Register | Neutral | Neutral |
| How common | Top 2,000 (common) | Beyond 10,000 (less common) |
| CEFR level | C1 | - |
| Part of speech | noun | |
| Collocations | considerable, extra, extreme, exercise, take, use, with caution, err on the side of caution, the need for caution, sound a note of caution, formal, get off with, receive, give somebody | give fair warning, issue fair warning, receive fair warning |
| Antonyms | carelessness, recklessness | - |
| Common mistakes | Confused with 'cause' — learners may use 'caution' incorrectly as a reason., Using 'caution' as a verb — 'caution' is primarily a noun., Incorrectly spelling 'caution' as 'cautiont'. | Used after the event instead of before., Confused with 'fairytale warning', which doesn't exist., Overused in casual conversations. |
| Usage notes | Use 'caution' when advising someone to be careful. It is appropriate in both spoken and written contexts, but can sound slightly formal in casual conversations. | Used to alert someone before a potentially unpleasant or important situation. Can be informal or formal depending on context. |
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Frequently asked questions: Caution vs Fair warning
What's the difference between Caution and Fair warning?
Caution: Be careful. Fair warning: A heads-up about something to expect in the future.
Which is more common: Caution and Fair warning?
Caution is the most common in everyday English.
Can you show an example of each?
Caution: Caution is advised when driving in heavy rain. Fair warning: She gave me a fair warning about the difficult exam coming up next week.
Can I use Caution and Fair warning interchangeably?
Not always. Caution and Fair warning 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.