Which to use
“catalyseur” is a noun and “catalyseurs” is an adjective - they look or sound alike but fill different roles in a sentence.
- #21,881
- “catalyseur” frequency rank
- #43,830
- “catalyseurs” frequency rank
- 65711
- confusion score
Side-by-Side Comparison
| Feature | catalyseur | catalyseurs |
|---|---|---|
| Definition | Agent de la catalyse ; élément favorisant, voire indispensable, à une réaction chimique ou biochimique qui n’en sort pas modifié. | Masculin pluriel de catalyseur. |
Same sound, different letters: catalyseur vs catalyseurs
Muted letters are shared; highlighted letters are the only spelling cue when pronunciation matches. Shared run: 10 letters. catalyseur runs 10 letters (CVCVCVCVVC) against catalyseurs's 11 (CVCVCVCVVCC) - the length gap alone is often enough to separate them once you know to check it.
Ear matches; page differs - catalyseur and catalyseurs
Say them out loud and nothing separates them: catalyseur and catalyseurs carry the same recorded pronunciation, \ka.ta.li.zœʁ\. Grammar is what tells them apart: one is anoun, the other anadjective, so most sentences will only accept one of them. They differ by 1 extra letter(s) - “catalyseur” sits inside “catalyseurs”. Our composite confusion score for this pair is 65711, derived from the frequency rank of both members and their visual similarity.
catalyseur is recorded at frequency rank #21,881, classified as anoun, pronounced \ka.ta.li.zœʁ\. catalyseurs is at rank #43,830, tagged as anadj, pronounced \ka.ta.li.zœʁ\.
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 65711, this pair ranks #71,099 of 440,172 scored French confusable pairs - among the most confusable pairs.
Orthographic DNA of catalyseur vs catalyseurs
Shared letters: acelrstuy. Private to "catalyseur": -. Private to "catalyseurs": -.
"catalyseur" · 10 letters · shape CVCVCVCVVC · "catalyseurs" · 11 letters · shape CVCVCVCVVCC
Known mistypes of this pair
- catalyseur ← actalyseur · caatlyseur · catallyseur · catalsyeur · catalyesur · catalyseru · catalyseurr · catalysseur
- catalyseurs ← actalyseurs · caatlyseurs · catallyseurs · catalsyeurs · catalyesurs · catalyserus · catalyseurrs · catalyseurss
Frequently Asked Questions
Do "catalyseur" and "catalyseurs" mean the same thing in a sentence?
Frequency check: "catalyseur" vs "catalyseurs" - which ranks higher?
Useful next steps
"catalyseur" and "catalyseurs" share a sound, keep the gloss open, then jump to the headword or a nearby trap.
- Full dictionary entry for "catalyseur" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "catalyseurs" - compare definitions side by side with the headword page. Word entry
- This pair ranks #71,099 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
- 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 #71,099 of 440,172 scored French pairs, corpus vintage 2026-09-03, not spelling advice.