Fool vs Imbecile

When to use each in English, with meaning, register, and examples.

Fool

Top 2,000 (common)B2noun

Imbecile

InformalTop 5,000 (fairly common)
Most formal: FoolMost common: Fool
 FoolImbecile
Pronunciation🇬🇧 /["/fuːl/"]/🇺🇸 /["/fuːl/"]/🇬🇧 //ˈɪmbəsiːl//🇺🇸 //ˈɪmbəˌsiːl//
Meaninga person who makes mistakes or is easily trickeda very stupid person
ExampleHe felt like a fool after forgetting his best friend's birthday.Don't be such an imbecile!
RegisterNeutralInformal
How commonTop 2,000 (common)Top 5,000 (fairly common)
CEFR levelB2-
Part of speechnoun
Collocationsbig, great, silly, feel, feel like, look, like a fool, fool of a something, act the fool, play the fool, be no foolcall someone an imbecile, act like an imbecile, feel like an imbecile
Antonymsgenius, sensible, wisegenius, intellect, smart person
Common mistakesUsing 'fool' as a verb without an object, e.g., 'I fool.', Confusing 'fool' with 'fools' as plural without context., Overusing in formal conversations where 'deceived' may be more appropriate.Overusing it in serious discussions., Confusing it with 'innocent' or 'ignorant'.
Usage notesUsed when someone is deceived or makes a silly decision. Avoid in serious contexts to not offend someone.Used informally, often as an insult. May be considered offensive and is not suitable for formal contexts.

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Fool
Imbecile

Frequently asked questions: Fool vs Imbecile

What's the difference between Fool and Imbecile?

Fool: a person who makes mistakes or is easily tricked Imbecile: a very stupid person

Which is more formal: Fool and Imbecile?

Fool is the most formal of these.

Which is more common: Fool and Imbecile?

Fool is the most common in everyday English.

Can you show an example of each?

Fool: He felt like a fool after forgetting his best friend's birthday. Imbecile: Don't be such an imbecile!

Can I use Fool and Imbecile interchangeably?

Not always. Fool and Imbecile 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.

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