Error vs Foul-up

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

Error

Top 1,000 (very common)A2noun

Foul-up

InformalBeyond 10,000 (less common)
Most formal: ErrorMost common: Error
 ErrorFoul-up
Pronunciation🇬🇧 /["/ˈerə(r)/"]/🇺🇸 /["/ˈerər/"]/🇬🇧 //ˈfaʊlʌp//🇺🇸 //ˈfaʊlˌʌp//
MeaningA mistake or something wrong that happens.To make a mistake or cause a problem.
ExampleI made an error in my calculations.He really had a foul-up during the meeting when he forgot the main points.
RegisterNeutralInformal
How commonTop 1,000 (very common)Beyond 10,000 (less common)
CEFR levelA2-
Part of speechnoun
Collocationsegregious, 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/​judgmentmajor foul-up, foul-up a plan, avoid a foul-up, foul-up in communication, classic foul-up
Antonymssuccess, correctness, accuracysuccess, achievement
Common mistakes'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.Confused with 'foul' as in 'bad' or 'offensive'., Using 'foul-up' in a serious context instead of a light, informal one., Not recognizing 'foul-up' as a verb phrase.
Usage notesUse '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.Use 'foul-up' informally, often in casual conversation or writing. Avoid in formal contexts or professional settings.

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Foul-up

Frequently asked questions: Error vs Foul-up

What's the difference between Error and Foul-up?

Error: A mistake or something wrong that happens. Foul-up: To make a mistake or cause a problem.

Which is more formal: Error and Foul-up?

Error is the most formal of these.

Which is more common: Error and Foul-up?

Error is the most common in everyday English.

Can you show an example of each?

Error: I made an error in my calculations. Foul-up: He really had a foul-up during the meeting when he forgot the main points.

Can I use Error and Foul-up interchangeably?

Not always. Error and Foul-up 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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