Which to use
“perf” is an adjective and “peso” is a noun - they look or sound alike but fill different roles in a sentence.
- #42,815
- “perf” frequency rank
- #29,034
- “peso” frequency rank
- 71849
- confusion score
Side-by-Side Comparison
| Feature | perf | peso |
|---|---|---|
| Definition | Abbreviation of perforated; when followed by a number, eg, perf 14, this indicates the number of perforations per two centimetres. | A former unit of currency in Spain and Spain's colonies, worth 8 reales; the Spanish dollar. |
Where the eye mixes perf and peso
Muted = shared; highlighted = the visual trap. They share 2 letters in sequence. perf (CVCC) and peso (CVCV) run the same length but a different consonant-vowel pattern - the shape difference is usually the fastest tell.
Visual trap between perf and peso
These two trip readers on the page rather than in the ear: perf is /pɜː(ɹ)f/ while peso is /ˈpeɪsəʊ/. Spoken aloud the problem disappears. In writing it persists, because they share most of their letters but differ in 2 positions, and the parts of speech differ too (adjective vs noun), which is usually the fastest check. Our composite confusion score for this pair is 71849, 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/. peso is at rank #29,034, tagged as anoun, pronounced /ˈpeɪsəʊ/.
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 71849, this pair ranks #45,139 of 530,003 scored English confusable pairs - among the most confusable pairs.
Orthographic DNA of perf vs peso
Shared letters: ep. Private to "perf": fr. Private to "peso": os.
"perf" · 4 letters · shape CVCC · "peso" · 4 letters · shape CVCV
Known mistypes of this pair
Frequently Asked Questions
Can "perf" and "peso" be used interchangeably?
Which is more common, "perf" or "peso"?
Useful next steps
Pronunciation already separates them, if the page still looks alike, the dictionary links below settle it.
- Full dictionary entry for "perf" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "peso" - compare definitions side by side with the headword page. Word entry
- This pair ranks #45,139 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "perf" and "peso" also get mixed up with nearby pairs, the highest-scored neighbour is "pecs vs perf". 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 #45,139 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.