unvsutWhat's the difference?

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

Which to use

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

#12
“un” frequency rank
#20,597
“ut” frequency rank
20609
confusion score

Side-by-Side Comparison

Feature un ut
Definition Marque l’unité, le fait qu’une personne ou une chose est seule, unique en son espèce. La première note de l’échelle des sons.

Where the eye mixes un and ut

Muted = shared; highlighted = the visual trap. They share 1 letter in sequence.

2 ch
un
2 ch
ut

Spelling & Dictionary Insight

These two trip readers on the page rather than in the ear: un is \œ̃\ while ut is \yt\. Spoken aloud the problem disappears. In writing it persists, because they differ by a single letter - n in “un” becomes t in “ut”, and the parts of speech differ too (adjective vs noun), which is usually the fastest check. Our composite confusion score for this pair is 20609, derived from the frequency rank of both members and their visual similarity.

un is recorded at frequency rank #12, classified as anadj, pronounced \œ̃\. ut is at rank #20,597, tagged as anoun, pronounced \yt\.

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 20609, this pair ranks #367,407 of 440,172 scored French confusable pairs - a relatively easy-to-tell-apart pair.

Orthographic DNA of un vs ut

Shared letters: u. Private to "un": n. Private to "ut": t.

"un" · 2 letters · shape VC  ·  "ut" · 2 letters · shape VC

Frequently Asked Questions

Can "un" and "ut" be used interchangeably?
No - they are not even the same part of speech. "un" is an adjective and "ut" a noun, so a sentence built for one is usually ungrammatical with the other.
Which is more common, "un" or "ut"?
"un" is the more common of the two: it sits at frequency rank #12 in our French list, against #20,597 for "ut". That is a wide gap, so in ordinary text the rarer spelling is the one worth double-checking.

Source: Wiktionary (via kaikki.org) Structured Wiktionary extract

Source: FrequencyWords open word-frequency list