Which to use
“périmètre” is a noun and “perpétré” is a verb - they look or sound alike but fill different roles in a sentence.
- #6,990
- “périmètre” frequency rank
- #29,076
- “perpétré” frequency rank
- 36066
- confusion score
Side-by-Side Comparison
| Feature | périmètre | perpétré |
|---|---|---|
| Definition | Contour d’une figure plane. | Participe passé masculin singulier de perpétrer. |
Where the eye mixes périmètre and perpétré
Muted = shared; highlighted = the visual trap. They share 4 letters in sequence. périmètre runs 9 letters (CVCVCVCCV) against perpétré's 8 (CVCCVCCV) - the length gap alone is often enough to separate them once you know to check it.
Why the eye confuses périmètre with perpétré
These two trip readers on the page rather than in the ear: périmètre is \pe.ʁi.mɛtʁ\ while perpétré is \pɛʁ.pe.tʁe\. Spoken aloud the problem disappears. In writing it persists, because they differ by 1 letter(s) in length, and the parts of speech differ too (noun vs verb), which is usually the fastest check. Our composite confusion score for this pair is 36066, derived from the frequency rank of both members and their visual similarity.
périmètre is recorded at frequency rank #6,990, classified as anoun, pronounced \pe.ʁi.mɛtʁ\. perpétré is at rank #29,076, tagged as averb, pronounced \pɛʁ.pe.tʁe\.
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 36066, this pair ranks #272,240 of 440,172 scored French confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of périmètre vs perpétré
Shared letters: eprté. Private to "périmètre": imè. Private to "perpétré": -.
"périmètre" · 9 letters · shape CVCVCVCCV · "perpétré" · 8 letters · shape CVCCVCCV
Frequently Asked Questions
Can "périmètre" and "perpétré" be used interchangeably?
Frequency check: "périmètre" vs "perpétré" - which ranks higher?
After this comparison
Visual near-miss handled. Browse the word pages or a neighbour when the next look-alike shows up.
- Full dictionary entry for "périmètre" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "perpétré" - compare definitions side by side with the headword page. Word entry
- This pair ranks #272,240 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
- "périmètre" and "perpétré" also get mixed up with nearby pairs, the highest-scored neighbour is "perpétré vs perpétrés". Nearby pair
Confusion rank #272,240 of 440,172 scored French pairs, corpus vintage 2026-09-03, not spelling advice.