Which to use
“pec” is a noun and “perf” is an adjective - they look or sound alike but fill different roles in a sentence.
- #47,251
- “pec” frequency rank
- #42,815
- “perf” frequency rank
- 90066
- confusion score
Side-by-Side Comparison
| Feature | pec | perf |
|---|---|---|
| Definition | The pectoralis major muscle. | Abbreviation of perforated; when followed by a number, eg, perf 14, this indicates the number of perforations per two centimetres. |
Letter map: pec vs perf
Shared letters muted; letters that set pec and perf apart highlighted. Shared run: 2. pec runs 3 letters (CVC) against perf's 4 (CVCC) - the length gap alone is often enough to separate them once you know to check it.
Grammar separator: pec vs perf
Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: pec is anoun and perfanadjective. On the page they differ by 1 letter(s) in length. Our composite confusion score for this pair is 90066, derived from the frequency rank of both members and their visual similarity.
pec is recorded at frequency rank #47,251, classified as anoun. perf is at rank #42,815, tagged as anadj, pronounced /pɜː(ɹ)f/.
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 90066, this pair ranks #4,539 of 530,003 scored English confusable pairs - among the most confusable pairs.
Orthographic DNA of pec vs perf
Shared letters: ep. Private to "pec": c. Private to "perf": fr.
"pec" · 3 letters · shape CVC · "perf" · 4 letters · shape CVCC
Known mistypes of this pair
- perf ← eprf · pefr · perff · perrf · pperf · pref
Frequently Asked Questions
Can "pec" and "perf" be used interchangeably?
Frequency check: "pec" vs "perf" - which ranks higher?
What to do next
Done with this confusable. These links stay specific to "pec" and "perf".
- Full dictionary entry for "pec" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "perf" - compare definitions side by side with the headword page. Word entry
- This pair ranks #4,539 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "pec" and "perf" also get mixed up with nearby pairs, the highest-scored neighbour is "pec vs PPA". 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 #4,539 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.