Which to use
“perp” and “prop” are a confusable English pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #44,400
- “perp” frequency rank
- #10,112
- “prop” frequency rank
- 54512
- confusion score
Side-by-Side Comparison
| Feature | perp | prop |
|---|---|---|
| Definition | A perpetrator. | An object placed against or under another, to support it; anything that supports. |
Where the eye mixes perp and prop
Muted = shared; highlighted = the visual trap. They share 3 letters in sequence. perp (CVCC) and prop (CCVC) run the same length but a different consonant-vowel pattern - the shape difference is usually the fastest tell.
Why the eye confuses perp with prop
A purely visual mix-up. perp (/pɝp/) 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 share most of their letters but differ in 2 positions. Our composite confusion score for this pair is 54512, derived from the frequency rank of both members and their visual similarity.
perp is recorded at frequency rank #44,400, classified as anoun, pronounced /pɝp/. 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 54512, this pair ranks #140,524 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of perp vs prop
Shared letters: pr. Private to "perp": e. Private to "prop": o.
"perp" · 4 letters · shape CVCC · "prop" · 4 letters · shape CCVC
Known mistypes of this pair
Frequently Asked Questions
Can "perp" and "prop" be used interchangeably?
Frequency check: "perp" vs "prop" - which ranks higher?
Useful next steps
Pronunciation already separates them, if the page still looks alike, the dictionary links below settle it.
- Full dictionary entry for "perp" 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 #140,524 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "perp" and "prop" also get mixed up with nearby pairs, the highest-scored neighbour is "pecs vs perp". 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 #140,524 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.