Which to use
“un” is an adjective and “USA” is a name - they look or sound alike but fill different roles in a sentence.
- #12
- “un” frequency rank
- #2,602
- “USA” frequency rank
- 2614
- confusion score
Side-by-Side Comparison
| Feature | un | USA |
|---|---|---|
| Definition | Marque l’unité, le fait qu’une personne ou une chose est seule, unique en son espèce. | États-Unis d’Amérique. |
Where the eye mixes un and USA
Muted = shared; highlighted = the visual trap. They share 1 letter in sequence.
Why the eye confuses un with USA
These two trip readers on the page rather than in the ear: un is \œ̃\ while USA is \y.ɛs.a\. 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 name), which is usually the fastest check. Our composite confusion score for this pair is 2614, derived from the frequency rank of both members and their visual similarity.
un is recorded at frequency rank #12, classified as anadj, pronounced \œ̃\. USA is at rank #2,602, tagged as aname, pronounced \y.ɛs.a\.
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 2614, this pair ranks #435,802 of 440,172 scored French confusable pairs - a relatively easy-to-tell-apart pair.
Orthographic DNA of un vs USA
Shared letters: u. Private to "un": n. Private to "USA": as.
"un" · 2 letters · shape VC · "USA" · 3 letters · shape VCV
Frequently Asked Questions
Is swapping "un" for "USA" ever safe?
Which is more common, "un" or "USA"?
After this comparison
Eye-level mix-up between "un" and "USA" is sorted above. Next: full entries or other pairs that share a letter shape.
- Full dictionary entry for "un" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "USA" - compare definitions side by side with the headword page. Word entry
- This pair ranks #435,802 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
- "un" and "USA" also get mixed up with nearby pairs, the highest-scored neighbour is "Ubu vs USA". Nearby pair
Confusion rank #435,802 of 440,172 scored French pairs, corpus vintage 2026-09-03, not spelling advice.