Idiotic vs Stupid

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

Idiotic

InformalTop 5,000 (fairly common)

Stupid

InformalTop 1,000 (very common)A2adjective
Most common: Stupid
 IdioticStupid
Pronunciation🇬🇧 //ɪdɪˈɒtɪk//🇺🇸 //ɪdɪˈɑtɪk//🇬🇧 /["/ˈstjuːpɪd/"]/🇺🇸 /["/ˈstuːpɪd/"]/
MeaningVery foolish or stupid.Not smart or showing a lack of intelligence.
ExampleHis decision to skip the exam was idiotic.That was a stupid mistake to make.
RegisterInformalInformal
How commonTop 5,000 (fairly common)Top 1,000 (very common)
CEFR level-A2
Part of speechadjective
Collocationsidiotic behavior, idiotic idea, idiotic remarksappear, be, feel, extremely, fairly, very, be too stupid to do something, appear, be, feel, extremely, fairly, very, be too stupid to do something
Antonymsintelligent, sensible, wiseintelligent, smart, clever
Common mistakesUsed in formal writing., Confused with 'idiot' as a noun., Misused to describe minor mistakes.Using 'stupid' to describe people instead of actions., Confusing 'stupid' with 'ignorant'., Overusing 'stupid' in formal writing.
Usage notesUse 'idiotic' to describe something extremely foolish or nonsensical. Avoid it in formal settings as it can be considered offensive.Use 'stupid' to describe a behavior or action, but be cautious in formal settings as it can come off as rude or offensive.

See it in real clips

Idiotic
Stupid

Frequently asked questions: Idiotic vs Stupid

What's the difference between Idiotic and Stupid?

Idiotic: Very foolish or stupid. Stupid: Not smart or showing a lack of intelligence.

Which is more common: Idiotic and Stupid?

Stupid is the most common in everyday English.

Can you show an example of each?

Idiotic: His decision to skip the exam was idiotic. Stupid: That was a stupid mistake to make.

Can I use Idiotic and Stupid interchangeably?

Not always. Idiotic and Stupid 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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