Which to use
“poisson” is a noun and “Poissy” is a name - they look or sound alike but fill different roles in a sentence.
- #2,589
- “poisson” frequency rank
- #23,980
- “Poissy” frequency rank
- 26569
- confusion score
Side-by-Side Comparison
| Feature | poisson | Poissy |
|---|---|---|
| Definition | Animal possédant un squelette, généralement ovipare (mais parfois ovovivipare ou vivipare), vivant dans l’eau, et respirant généralement par des branchies (bien que certaines espèces aient des systèmes de respiration aérienne complémentaire, comme les poumons des dipneustes ou le labyrinthe des anabantidés). | Commune française, située dans le département des Yvelines. |
Where the eye mixes poisson and Poissy
Muted = shared; highlighted = the visual trap. They share 5 letters in sequence. poisson runs 7 letters (CVVCCVC) against Poissy's 6 (CVVCCV) - the length gap alone is often enough to separate them once you know to check it.
Why the eye confuses poisson with Poissy
These two trip readers on the page rather than in the ear: poisson is \pwa.sɔ̃\ while Poissy is \pwa.si\. 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 name), which is usually the fastest check. Our composite confusion score for this pair is 26569, derived from the frequency rank of both members and their visual similarity.
poisson is recorded at frequency rank #2,589, classified as anoun, pronounced \pwa.sɔ̃\. Poissy is at rank #23,980, tagged as aname, pronounced \pwa.si\.
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 26569, this pair ranks #334,182 of 440,172 scored French confusable pairs - a relatively easy-to-tell-apart pair.
Orthographic DNA of poisson vs Poissy
Shared letters: iops. Private to "poisson": n. Private to "Poissy": y.
"poisson" · 7 letters · shape CVVCCVC · "Poissy" · 6 letters · shape CVVCCV
Known mistypes of this pair
Frequently Asked Questions
Can "poisson" and "Poissy" be used interchangeably?
In ordinary French text, does "poisson" or "Poissy" show up more?
After this comparison
Pronunciation already separates them, if the page still looks alike, the dictionary links below settle it.
- Full dictionary entry for "poisson" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "Poissy" - compare definitions side by side with the headword page. Word entry
- This pair ranks #334,182 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
- "poisson" and "Poissy" also get mixed up with nearby pairs, the highest-scored neighbour is "Passy vs Poissy". 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 #334,182 of 440,172 scored French pairs, corpus vintage 2026-09-03, not spelling advice.