Which to use
“perp” and “pup” are a confusable English pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #44,400
- “perp” frequency rank
- #12,305
- “pup” frequency rank
- 56705
- confusion score
Side-by-Side Comparison
| Feature | perp | pup |
|---|---|---|
| Definition | A perpetrator. | A young dog, wolf, fox, seal, bat or shark, or the young of certain other animals. |
Where the eye mixes perp and pup
Muted = shared; highlighted = the visual trap. They share 2 letters in sequence.
Look-alike desk: perp vs pup
A purely visual mix-up. perp (/pɝp/) and pup (/pʌp/) 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 56705, 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/. pup is at rank #12,305, tagged as anoun, pronounced /pʌp/.
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 56705, this pair ranks #124,320 of 530,003 scored English confusable pairs - among the most confusable pairs.
Orthographic DNA of perp vs pup
Shared letters: p. Private to "perp": er. Private to "pup": u.
"perp" · 4 letters · shape CVCC · "pup" · 3 letters · shape CVC
Known mistypes of this pair
- perp ← eprp · pepr · perpp · perrp · pperp
Frequently Asked Questions
Is swapping "perp" for "pup" ever safe?
Frequency check: "perp" vs "pup" - which ranks higher?
After this comparison
Eye-level mix-up between "perp" and "pup" is sorted above. Next: full entries or other pairs that share a letter shape.
- Full dictionary entry for "perp" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "pup" - compare definitions side by side with the headword page. Word entry
- This pair ranks #124,320 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "perp" and "pup" 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 #124,320 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.