Fault vs Flaws

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

Fault

Top 1,000 (very common)B2noun

Flaws

Top 1,000 (very common)
 FaultFlaws
Pronunciation🇬🇧 /["/fɔːlt/"]/🇺🇸 /["/fɔːlt/"]/🇬🇧 //flɔːz//🇺🇸 //flɔz//
MeaningA mistake or a problem in something.Problems or weaknesses in something.
ExampleThe engineer quickly identified the fault in the electricity supply.The report highlighted several flaws in the original design.
RegisterNeutralNeutral
How commonTop 1,000 (very common)Top 1,000 (very common)
CEFR levelB2-
Part of speechnoun
Collocationsstupid, entire, lie with somebody, at fault, through somebody’s fault, without fault, be all somebody’s fault, be entirely somebody’s fault, be largely somebody’s fault, big, great, moral, have, be blind to, overlook, fault in, for all somebody’s faults, to a fault, major, minor, dangerous, have, develop, look for, occur, lie in something, fault in, fault with, for all its faults, double, foot, serve, earthquake, geological, line, scarp, systemidentify flaws, expose flaws, flaws in judgment, flaws in reasoning, critical flaws
Antonymsmerit, virtue, advantageperfections, virtues, strengths
Common mistakesConfusing 'fault' with 'error' — 'fault' often implies blame., Using 'fault' inappropriately as a verb instead of a noun., Misplacing the article — 'the fault' vs. 'fault'.Confused with 'flawless', thinking they are opposites., Used with singular verbs instead of plural., Misunderstanding the meaning, thinking it only refers to physical faults.
Usage notesUse 'fault' in both formal and informal conversations when discussing blame or a defect. Avoid using it in overly casual contexts.Use 'flaws' to point out faults in a person or thing. It's generally neutral, but can be critical in negative contexts.

Frequently asked questions: Fault vs Flaws

What's the difference between Fault and Flaws?

Fault: A mistake or a problem in something. Flaws: Problems or weaknesses in something.

Can you show an example of each?

Fault: The engineer quickly identified the fault in the electricity supply. Flaws: The report highlighted several flaws in the original design.

Can I use Fault and Flaws interchangeably?

Not always. Fault and Flaws 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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