unitésvsusitéTell them apart

Quick tell: unités is a noun, usité is an adjective, so they fill different roles in a sentence.

Which to use

“unités” is a noun and “usité” is an adjective - they look or sound alike but fill different roles in a sentence.

#2,254
“unités” frequency rank
#41,053
“usité” frequency rank
43307
confusion score

Side-by-Side Comparison

Feature unités usité
Definition Pluriel de unité. Qui est en usage, qui est pratiqué communément.

Where the eye mixes unités and usité

Muted = shared; highlighted = the visual trap. They share 4 letters in sequence. unités runs 6 letters (VCVCVC) against usité's 5 (VCVCV) - the length gap alone is often enough to separate them once you know to check it.

6 ch
unités
5 ch
usité

Visual trap between unités and usité

These two trip readers on the page rather than in the ear: unités is \y.ni.te\ while usité is \y.zi.te\. 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 adjective), which is usually the fastest check. Our composite confusion score for this pair is 43307, derived from the frequency rank of both members and their visual similarity.

unités is recorded at frequency rank #2,254, classified as anoun, pronounced \y.ni.te\. usité is at rank #41,053, tagged as anadj, pronounced \y.zi.te\.

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 43307, this pair ranks #219,081 of 440,172 scored French confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of unités vs usité

Shared letters: istué. Private to "unités": n. Private to "usité": -.

"unités" · 6 letters · shape VCVCVC  ·  "usité" · 5 letters · shape VCVCV

Frequently Asked Questions

Is swapping "unités" for "usité" ever safe?
No - they are not even the same part of speech. "unités" is a noun and "usité" an adjective, so a sentence built for one is usually ungrammatical with the other.
In ordinary French text, does "unités" or "usité" show up more?
"unités" is the more common of the two: it sits at frequency rank #2,254 in our French list, against #41,053 for "usité". That is a wide gap, so in ordinary text the rarer spelling is the one worth double-checking.

Useful next steps

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

  • Full dictionary entry for "unités" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "usité" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #219,081 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
  • "unités" and "usité" also get mixed up with nearby pairs, the highest-scored neighbour is "uit vs usité". Nearby pair

Confusion rank #219,081 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