CaïnvscassinWhich spelling fits?

Quick tell: Caïn is a name, cassin is a noun, so they fill different roles in a sentence.

Which to use

“Caïn” is a name and “cassin” is a noun - they look or sound alike but fill different roles in a sentence.

#34,923
“Caïn” frequency rank
#42,220
“cassin” frequency rank
77143
confusion score

Side-by-Side Comparison

Feature Caïn cassin
Definition Premier fils d’Adam et Ève dans la Bible, connu pour avoir tué son frère cadet Abel. Châssis au-dessus du métier à tisser la soie, où sont attachées les poulies.

Where the eye mixes Caïn and cassin

Muted = shared; highlighted = the visual trap. They share 3 letters in sequence.

4 ch
Caïn
6 ch
cassin

Visual trap between Caïn and cassin

These two trip readers on the page rather than in the ear: Caïn is \ka.ɛ̃\ while cassin is \ka.sɛ̃\. Spoken aloud the problem disappears. In writing it persists, because they differ by 2 letter(s) in length, and the parts of speech differ too (name vs noun), which is usually the fastest check. Our composite confusion score for this pair is 77143, derived from the frequency rank of both members and their visual similarity.

Caïn is recorded at frequency rank #34,923, classified as aname, pronounced \ka.ɛ̃\. cassin is at rank #42,220, tagged as anoun, pronounced \ka.sɛ̃\.

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 77143, this pair ranks #29,205 of 440,172 scored French confusable pairs - among the most confusable pairs.

Orthographic DNA of Caïn vs cassin

Shared letters: acn. Private to "Caïn": ï. Private to "cassin": is.

"Caïn" · 4 letters · shape CVCC  ·  "cassin" · 6 letters · shape CVCCVC

Known mistypes of this pair

  • cassinacssin · casin · casisn · cassinn · cassni · ccassin · csasin

Frequently Asked Questions

Is swapping "Caïn" for "cassin" ever safe?
No - they are not even the same part of speech. "Caïn" is a name and "cassin" a noun, so a sentence built for one is usually ungrammatical with the other.
Which is more common, "Caïn" or "cassin"?
"Caïn" is the more common of the two: it sits at frequency rank #34,923 in our French list, against #42,220 for "cassin". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

After this comparison

Pronunciation already separates them, if the page still looks alike, the dictionary links below settle it.

  • Full dictionary entry for "Caïn" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "cassin" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #29,205 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
  • "Caïn" and "cassin" also get mixed up with nearby pairs, the highest-scored neighbour is "cardin vs cassin". 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 #29,205 of 440,172 scored French pairs, corpus vintage 2026-09-03, not spelling advice.

Source: Wiktionary (via kaikki.org) Structured Wiktionary extract

Source: FrequencyWords open word-frequency list