Imbecile vs Moron

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

Imbecile

Informal Top 5,000 (fairly common)

Moron

Informal Top 5,000 (fairly common)

	Imbecile	Moron
Pronunciation	🇬🇧 //ˈɪmbəsiːl// 🇺🇸 //ˈɪmbəˌsiːl//	🇬🇧 //ˈmɔːrɒn// 🇺🇸 //ˈmɔrɑn//
Meaning	a very stupid person	A person who is very silly or stupid.
Example	Don't be such an imbecile!	I can't believe he forgot his own birthday; what a moron!
Register	Informal	Informal
How common	Top 5,000 (fairly common)	Top 5,000 (fairly common)
Collocations	call someone an imbecile, act like an imbecile, feel like an imbecile	total moron, complete moron, such a moron
Antonyms	genius, intellect, smart person	genius, intellect, smart person
Common mistakes	Overusing it in serious discussions., Confusing it with 'innocent' or 'ignorant'.	Used in formal writing contexts., Confused with 'idiot' or 'fool', though they're similar., Used to describe someone in a non-derogatory context.
Usage notes	Used informally, often as an insult. May be considered offensive and is not suitable for formal contexts.	Use this word informally to describe someone acting foolishly. It's often considered derogatory and shouldn't be used in formal contexts.

See it in real clips

an imbecile, a moron who goes on television

Imbecile

Thank you, you moron.

an imbecile, a moron who goes on television

Thank you, you moron.

an imbecile, a moron who goes on television

Moron

Frequently asked questions: Imbecile vs Moron

What's the difference between Imbecile and Moron?

Imbecile: a very stupid person Moron: A person who is very silly or stupid.

Can you show an example of each?

Imbecile: Don't be such an imbecile! Moron: I can't believe he forgot his own birthday; what a moron!

Can I use Imbecile and Moron interchangeably?

Not always. Imbecile and Moron 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.