Blunder vs Error vs Mistake

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

Blunder

Top 2,000 (common)B1noun

Error

Top 1,000 (very common)A2noun

Mistake

Top 1,000 (very common)A1noun
 BlunderErrorMistake
Pronunciation🇬🇧 //ˈblʌndə//🇺🇸 //ˈblʌndər//🇬🇧 /["/ˈerə(r)/"]/🇺🇸 /["/ˈerər/"]/🇬🇧 /["/mɪˈsteɪk/"]/🇺🇸 /["/mɪˈsteɪk/"]/
MeaningA big mistake or careless error.A mistake or something wrong that happens.An error or something done wrongly.
ExampleHis explanation was full of blunders that made everyone confused.I made an error in my calculations.I made a mistake on my homework.
RegisterNeutralNeutralNeutral
How commonTop 2,000 (common)Top 1,000 (very common)Top 1,000 (very common)
CEFR levelB1A2A1
Part of speechnounnounnoun
Collocationsserious blunder, common blunder, make a blunderegregious, fundamental, glaring, commit, make, cause, arise (from something), occur, result (from something), detection, correction, message, in error, error in, a comedy of errors, an error in judgement/​judgment, an error of judgement/​judgmentbig, 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, successsuccess, correctness, accuracycorrect, 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.'Error' confused with 'mistake' – 'error' is usually more formal., Saying 'an error' and 'the error' interchangeably – be consistent with articles., Using 'error' without context – always clarify what type of error.'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.Use 'error' in both formal and casual contexts when talking about mistakes in writing, computer systems, or decisions. Avoid using it in very casual settings without explanation.Used in both casual and formal contexts. It’s appropriate in everyday conversation but can also be used in professional discussions about errors.

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Blunder
Mistake

Frequently asked questions: Blunder vs Error vs Mistake

What's the difference between Blunder, Error, and Mistake?

Blunder: A big mistake or careless error. Error: A mistake or something wrong that happens. Mistake: An error or something done wrongly.

Which is more advanced: Blunder, Error, and Mistake?

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

Are Blunder, Error, and Mistake the same CEFR level?

Blunder: B1, Error: A2, Mistake: A1 on the CEFR scale.

What part of speech are Blunder, Error, and Mistake?

Blunder: noun, Error: noun, Mistake: noun.

Can you show an example of each?

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

Can I use Blunder, Error, and Mistake interchangeably?

Not always. Blunder, Error, 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.