monvsmouWhich spelling fits?

Quick tell: mon is a determiner, mou is an adjective, so they fill different roles in a sentence.

Which to use

“mon” is a determiner and “mou” is an adjective - they look or sound alike but fill different roles in a sentence.

#66
“mon” frequency rank
#8,739
“mou” frequency rank
8805
confusion score

Side-by-Side Comparison

Feature mon mou
Definition Marque la possession ou l’appartenance. Le possesseur est le locuteur, ce qu’il possède est au masculin singulier. Qui cède facilement au toucher, qui reçoit facilement l’impression des autres corps.

Where the eye mixes mon and mou

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

3 ch
mon
3 ch
mou

Visual trap between mon and mou

These two trip readers on the page rather than in the ear: mon is \mɔ̃\ while mou is \mu\. Spoken aloud the problem disappears. In writing it persists, because they differ by a single letter - n in “mon” becomes u in “mou”, and the parts of speech differ too (determiner vs adjective), which is usually the fastest check. Our composite confusion score for this pair is 8805, derived from the frequency rank of both members and their visual similarity.

mon is recorded at frequency rank #66, classified as adet, pronounced \mɔ̃\. mou is at rank #8,739, tagged as anadj, pronounced \mu\.

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 8805, this pair ranks #418,782 of 440,172 scored French confusable pairs - a relatively easy-to-tell-apart pair.

Orthographic DNA of mon vs mou

Shared letters: mo. Private to "mon": n. Private to "mou": u.

"mon" · 3 letters · shape CVC  ·  "mou" · 3 letters · shape CVV

Frequently Asked Questions

Is swapping "mon" for "mou" ever safe?
No - they are not even the same part of speech. "mon" is a determiner and "mou" an adjective, so a sentence built for one is usually ungrammatical with the other.
Which is more common, "mon" or "mou"?
"mon" is the more common of the two: it sits at frequency rank #66 in our French list, against #8,739 for "mou". That is a wide gap, so in ordinary text the rarer spelling is the one worth double-checking.

What to do next

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

  • Full dictionary entry for "mon" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "mou" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #418,782 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
  • "mon" and "mou" also get mixed up with nearby pairs, the highest-scored neighbour is "mou vs MWh". Nearby pair

Confusion rank #418,782 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