Which to use
“perf” and “pert” are a confusable English pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #42,815
- “perf” frequency rank
- #47,823
- “pert” frequency rank
- 90638
- confusion score
Side-by-Side Comparison
| Feature | perf | pert |
|---|---|---|
| Definition | Abbreviation of perforated; when followed by a number, eg, perf 14, this indicates the number of perforations per two centimetres. | Attractive. |
Where the eye mixes perf and pert
Muted = shared; highlighted = the visual trap. They share 3 letters in sequence. perf and pert follow the identical consonant-vowel pattern (CVCC). Same shape at a glance is often the real trap, independent of shared letters.
Visual trap between perf and pert
A purely visual mix-up. perf (/pɜː(ɹ)f/) and pert (/pɜːt/) 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 a single letter - f in “perf” becomes t in “pert”. Our composite confusion score for this pair is 90638, derived from the frequency rank of both members and their visual similarity.
perf is recorded at frequency rank #42,815, classified as anadj, pronounced /pɜː(ɹ)f/. pert is at rank #47,823, tagged as anadj, pronounced /pɜːt/.
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 90638, this pair ranks #3,990 of 530,003 scored English confusable pairs - among the most confusable pairs.
Orthographic DNA of perf vs pert
Shared letters: epr. Private to "perf": f. Private to "pert": t.
"perf" · 4 letters · shape CVCC · "pert" · 4 letters · shape CVCC
Known mistypes of this pair
Frequently Asked Questions
Is swapping "perf" for "pert" ever safe?
Which is more common, "perf" or "pert"?
Useful next steps
Eye-level mix-up between "perf" and "pert" is sorted above. Next: full entries or other pairs that share a letter shape.
- Full dictionary entry for "perf" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "pert" - compare definitions side by side with the headword page. Word entry
- This pair ranks #3,990 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "perf" and "pert" also get mixed up with nearby pairs, the highest-scored neighbour is "pecs vs pert". 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 #3,990 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.