Which to use
“proof” and “prop” are a confusable English pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #2,052
- “proof” frequency rank
- #10,112
- “prop” frequency rank
- 12164
- confusion score
Side-by-Side Comparison
| Feature | proof | prop |
|---|---|---|
| Definition | An effort, process, or operation designed to establish or discover a fact or truth; an act of testing; a test; a trial. | An object placed against or under another, to support it; anything that supports. |
Where the eye mixes proof and prop
Muted = shared; highlighted = the visual trap. They share 3 letters in sequence.
Visual trap between proof and prop
A purely visual mix-up. proof (/pɹuːf/) and prop (/pɹɒp/) 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 letter(s) in length. Our composite confusion score for this pair is 12164, 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/. prop is at rank #10,112, tagged as anoun, pronounced /pɹɒp/.
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 12164, this pair ranks #483,100 of 530,003 scored English confusable pairs - a relatively easy-to-tell-apart pair.
Orthographic DNA of proof vs prop
Shared letters: opr. Private to "proof": f. Private to "prop": -.
"proof" · 5 letters · shape CCVVC · "prop" · 4 letters · shape CCVC
Known mistypes of this pair
Frequently Asked Questions
Is swapping "proof" for "prop" ever safe?
Which is more common, "proof" or "prop"?
What to do next
Visual near-miss handled. Browse the word pages or a neighbour when the next look-alike shows up.
- Full dictionary entry for "proof" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "prop" - compare definitions side by side with the headword page. Word entry
- This pair ranks #483,100 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "proof" and "prop" also get mixed up with nearby pairs, the highest-scored neighbour is "poops vs prop". 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 #483,100 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.