unievsunionTell them apart

Quick tell: unie is a adjective, union is a noun, so they fill different roles in a sentence.

Which to use

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

#11,498
“unie” frequency rank
#858
“union” frequency rank
12356
confusion score

Side-by-Side Comparison

Feature unie union
Definition Féminin singulier de uni. Opérateur de la théorie des ensembles, qui regroupe au sein d'un même ensemble les éléments de deux ensembles. Désigne également l'opération (le fait d'unir deux ensembles) ainsi que le résultat de cette opération, c'est-à-dire l'ensemble contenant tous les éléments appartenant à deux autres ensembles.

Where the eye mixes unie and union

Muted = shared; highlighted = the visual trap. They share 3 letters in sequence. unie runs 4 letters (VCVV) against union's 5 (VCVVC) - the length gap alone is often enough to separate them once you know to check it.

4 ch
unie
5 ch
union

Why the eye confuses unie with union

These two trip readers on the page rather than in the ear: unie is \y.ni\ while union is \y.njɔ̃\. 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 (adjective vs noun), which is usually the fastest check. Our composite confusion score for this pair is 12356, derived from the frequency rank of both members and their visual similarity.

unie is recorded at frequency rank #11,498, classified as anadj, pronounced \y.ni\. union is at rank #858, tagged as anoun, pronounced \y.njɔ̃\.

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 12356, this pair ranks #405,590 of 440,172 scored French confusable pairs - a relatively easy-to-tell-apart pair.

Orthographic DNA of unie vs union

Shared letters: inu. Private to "unie": e. Private to "union": o.

"unie" · 4 letters · shape VCVV  ·  "union" · 5 letters · shape VCVVC

Known mistypes of this pair

  • unienuie · uine · unei · unnie
  • unionnuion · uinon · unino · unionn · unnion · unoin

Frequently Asked Questions

Do "unie" and "union" mean the same thing in a sentence?
No - they are not even the same part of speech. "unie" is an adjective and "union" a noun, so a sentence built for one is usually ungrammatical with the other.
In ordinary French text, does "unie" or "union" show up more?
"union" is the more common of the two: it sits at frequency rank #858 in our French list, against #11,498 for "unie". That is a wide gap, so in ordinary text the rarer spelling is the one worth double-checking.

Useful next steps

Eye-level mix-up between "unie" and "union" is sorted above. Next: full entries or other pairs that share a letter shape.

  • Full dictionary entry for "unie" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "union" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #405,590 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
  • "unie" and "union" also get mixed up with nearby pairs, the highest-scored neighbour is "unie vs urée". 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 #405,590 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