caservscasseurWhich spelling fits?

Quick tell: caser is a verb, casseur is an adjective, so they fill different roles in a sentence.

Which to use

“caser” is a verb and “casseur” is an adjective - they look or sound alike but fill different roles in a sentence.

#22,196
“caser” frequency rank
#49,542
“casseur” frequency rank
71738
confusion score

Side-by-Side Comparison

Feature caser casseur
Definition Mettre dans une case. Qui casse, violent, agressif.

Where the eye mixes caser and casseur

Muted = shared; highlighted = the visual trap. They share 5 letters in sequence. caser runs 5 letters (CVCVC) against casseur's 7 (CVCCVVC) - the length gap alone is often enough to separate them once you know to check it.

5 ch
caser
7 ch
casseur

Look-alike desk: caser vs casseur

These two trip readers on the page rather than in the ear: caser is \kɑ.ze\ while casseur is \kɑ.sœʁ\. 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 (verb vs adjective), which is usually the fastest check. Our composite confusion score for this pair is 71738, derived from the frequency rank of both members and their visual similarity.

caser is recorded at frequency rank #22,196, classified as averb, pronounced \kɑ.ze\. casseur is at rank #49,542, tagged as anadj, pronounced \kɑ.sœʁ\.

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 71738, this pair ranks #46,465 of 440,172 scored French confusable pairs - among the most confusable pairs.

Orthographic DNA of caser vs casseur

Shared letters: acers. Private to "caser": -. Private to "casseur": u.

"caser" · 5 letters · shape CVCVC  ·  "casseur" · 7 letters · shape CVCCVVC

Known mistypes of this pair

  • caser ← acser · caesr · caserr · casre · ccaser · csaer
  • casseur ← acsseur · casesur · caseur · casseru · casseurr · ccasseur · csaseur

Frequently Asked Questions

Can "caser" and "casseur" be used interchangeably?
No - they are not even the same part of speech. "caser" is a verb and "casseur" an adjective, so a sentence built for one is usually ungrammatical with the other.
Frequency check: "caser" vs "casseur" - which ranks higher?
"caser" is the more common of the two: it sits at frequency rank #22,196 in our French list, against #49,542 for "casseur". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

What to do next

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

  • Full dictionary entry for "caser" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "casseur" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #46,465 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
  • "caser" and "casseur" also get mixed up with nearby pairs, the highest-scored neighbour is "casseur vs causeur". 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 #46,465 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