Which to use
“proof” and “proofs” are a confusable English pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #2,052
- “proof” frequency rank
- #17,927
- “proofs” frequency rank
- 19979
- confusion score
Side-by-Side Comparison
| Feature | proof | proofs |
|---|---|---|
| Definition | An effort, process, or operation designed to establish or discover a fact or truth; an act of testing; a test; a trial. | plural of proof. |
Where the eye mixes proof and proofs
Muted = shared; highlighted = the visual trap. They share 5 letters in sequence.
Why the eye confuses proof with proofs
A purely visual mix-up. proof (/pɹuːf/) and proofs (/pɹuːfs/) are said differently, so reading them aloud is the quickest way to catch the wrong one. On the page they stay close: they differ by 1 extra letter(s) - “proof” sits inside “proofs”. Our composite confusion score for this pair is 19979, derived from the frequency rank of both members and their visual similarity.
proof is recorded at frequency rank #2,052, classified as anoun, pronounced /pɹuːf/. proofs is at rank #17,927, tagged as anoun, pronounced /pɹuːfs/.
Glosses for this pair are partially populated in our dataset, but the full side-by-side definitions above should still guide you to the right choice.
With a confusion score of 19979, this pair ranks #434,378 of 530,003 scored English confusable pairs - a relatively easy-to-tell-apart pair.
Orthographic DNA of proof vs proofs
Shared letters: fopr. Private to "proof": -. Private to "proofs": s.
"proof" · 5 letters · shape CCVVC · "proofs" · 6 letters · shape CCVVCC
Known mistypes of this pair
Frequently Asked Questions
Is swapping "proof" for "proofs" ever safe?
Frequency check: "proof" vs "proofs" - which ranks higher?
Useful next steps
Eye-level mix-up between "proof" and "proofs" is sorted above. Next: full entries or other pairs that share a letter shape.
- Full dictionary entry for "proof" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "proofs" - compare definitions side by side with the headword page. Word entry
- This pair ranks #434,378 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "proof" and "proofs" also get mixed up with nearby pairs, the highest-scored neighbour is "poops vs proofs". Nearby pair
- Recorded mistypes exist for at least one side of this pair, useful when a spell-checker or OCR lands on the wrong form. See mistypes
Confusion rank #434,378 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.