unvsUnoWhich spelling fits?

Quick tell: un is a adjective, Uno is a name, so they fill different roles in a sentence.

Which to use

“un” is an adjective and “Uno” is a name - they look or sound alike but fill different roles in a sentence.

#12
“un” frequency rank
#20,307
“Uno” frequency rank
20319
confusion score

Side-by-Side Comparison

Feature un Uno
Definition Marque l’unité, le fait qu’une personne ou une chose est seule, unique en son espèce. Jeu de cartes édité par Mattel se jouant avec des cartes spéciales.

Where the eye mixes un and Uno

Muted = shared; highlighted = the visual trap. They share 2 letters in sequence.

2 ch
un
3 ch
Uno

Visual trap between un and Uno

These two trip readers on the page rather than in the ear: un is \œ̃\ while Uno is \u.no\. Spoken aloud the problem disappears. In writing it persists, because they differ by 1 extra letter(s) - “un” sits inside “Uno”, and the parts of speech differ too (adjective vs name), which is usually the fastest check. Our composite confusion score for this pair is 20319, derived from the frequency rank of both members and their visual similarity.

un is recorded at frequency rank #12, classified as anadj, pronounced \œ̃\. Uno is at rank #20,307, tagged as aname, pronounced \u.no\.

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 20319, this pair ranks #368,872 of 440,172 scored French confusable pairs - a relatively easy-to-tell-apart pair.

Orthographic DNA of un vs Uno

Shared letters: nu. Private to "un": -. Private to "Uno": o.

"un" · 2 letters · shape VC  ·  "Uno" · 3 letters · shape VCV

Frequently Asked Questions

Is swapping "un" for "Uno" ever safe?
No - they are not even the same part of speech. "un" is an adjective and "Uno" a name, so a sentence built for one is usually ungrammatical with the other.
In ordinary French text, does "un" or "Uno" show up more?
"un" is the more common of the two: it sits at frequency rank #12 in our French list, against #20,307 for "Uno". That is a wide gap, so in ordinary text the rarer spelling is the one worth double-checking.

Useful next steps

Visual near-miss handled. Browse the word pages or a neighbour when the next look-alike shows up.

  • Full dictionary entry for "un" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "Uno" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #368,872 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
  • "un" and "Uno" also get mixed up with nearby pairs, the highest-scored neighbour is "Ubu vs Uno". Nearby pair

Confusion rank #368,872 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