Blunder vs Mistake

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

Blunder

Top 2,000 (common)B1noun

Mistake

Top 1,000 (very common)A1noun
Most common: Mistake
 BlunderMistake
Pronunciation🇬🇧 //ˈblʌndə//🇺🇸 //ˈblʌndər//🇬🇧 /["/mɪˈsteɪk/"]/🇺🇸 /["/mɪˈsteɪk/"]/
MeaningA big mistake or careless error.An error or something done wrongly.
ExampleHis explanation was full of blunders that made everyone confused.I made a mistake on my homework.
RegisterNeutralNeutral
How commonTop 2,000 (common)Top 1,000 (very common)
CEFR levelB1A1
Part of speechnounnoun
Collocationsserious blunder, common blunder, make a blunderbig, colossal, great, make, commit, repeat, happen, occur, by mistake, mistake about, all a mistake, an easy mistake to make, make the mistake of doing something, big, colossal, great, make, commit, repeat, happen, occur, by mistake, mistake about, all a mistake, an easy mistake to make, make the mistake of doing something
Antonymsaccuracy, perfection, successcorrect, success
Common mistakesConfusing with 'fumble' which refers to a physical mistake rather than a mental error., Using 'blunder' only in formal situations; it can also be used in informal contexts., Overusing the word for small mistakes; it's meant for significant errors.'Mistakes' as a singular instead of plural (e.g., saying 'a mistake' when referring to multiple errors)., Confusing 'mistake' with 'error', where 'mistake' is more general., Using 'mistake' without a clear object (e.g., saying 'I made a mistake' is fine, but 'I made' alone is unclear).
Usage notesUse 'blunder' for mistakes that are noticeable and often embarrassing. It's suitable for most contexts but may sound too strong in casual conversation.Used in both casual and formal contexts. It’s appropriate in everyday conversation but can also be used in professional discussions about errors.

See it in real clips

Blunder
Mistake

Frequently asked questions: Blunder vs Mistake

What's the difference between Blunder and Mistake?

Blunder: A big mistake or careless error. Mistake: An error or something done wrongly.

Which is more common: Blunder and Mistake?

Mistake is the most common in everyday English.

Which is more advanced: Blunder and Mistake?

Blunder is the highest level, at B1, on the CEFR scale.

Are Blunder and Mistake the same CEFR level?

Blunder: B1, Mistake: A1 on the CEFR scale.

What part of speech are Blunder and Mistake?

Blunder: noun, Mistake: noun.

Can you show an example of each?

Blunder: His explanation was full of blunders that made everyone confused. Mistake: I made a mistake on my homework.

Can I use Blunder and Mistake interchangeably?

Not always. Blunder and Mistake 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.

Related comparisons