Proof vs The only alibi

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

Proof

Top 1,000 (very common)B2noun

The only alibi

Beyond 10,000 (less common)
Most common: Proof
 ProofThe only alibi
Pronunciation🇬🇧 /["/pruːf/"]/🇺🇸 /["/pruːf/"]/🇬🇧 //ði ˈəʊnli ˈæl.aɪ.baɪ//🇺🇸 //ði ˈoʊnli ˈæl.aɪ.baɪ//
MeaningA piece of evidence that shows something is true.the one reason that explains someone’s actions at a certain time
ExampleI need more proof to believe his story.His only alibi was that he was at home watching TV.
RegisterNeutralNeutral
How commonTop 1,000 (very common)Beyond 10,000 (less common)
CEFR levelB2-
Part of speechnoun
Collocationsclear, convincing, direct, be, constitute, have, without proof, proof of, the burden of proof, the onus of proof, a lack of proofprovide an alibi, establish an alibi, present an alibi
Antonymsdisproof, refutationthe only accusation, the only evidence against, the sole suspicion, the primary blame
Common mistakesConfused with 'prove' (verb) and 'proof' (noun)., Using 'proof' without specifying what it is evidence of., Mixing up 'proof' with 'evidence', though they can be similar.Confused with 'the only alibi' and 'the best alibi', Using it in contexts that are not related to crime or excuses, Misplacing emphasis on 'only' leading to misunderstanding
Usage notesUse 'proof' in discussions about facts, evidence, or validation. It's appropriate in formal settings like academic writing and legal contexts, but can also be casual in everyday conversation.Used in contexts involving crime or suspicion. It fits best in storytelling or formal discussions of evidence.

See it in real clips

Proof
The only alibi

Frequently asked questions: Proof vs The only alibi

What's the difference between Proof and The only alibi?

Proof: A piece of evidence that shows something is true. The only alibi: the one reason that explains someone’s actions at a certain time

Which is more common: Proof and The only alibi?

Proof is the most common in everyday English.

Can you show an example of each?

Proof: I need more proof to believe his story. The only alibi: His only alibi was that he was at home watching TV.

Can I use Proof and The only alibi interchangeably?

Not always. Proof and The only alibi 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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