Which to use
“millimètre” is a noun and “mm” is a symbol - they look or sound alike but fill different roles in a sentence.
- #26,438
- “millimètre” frequency rank
- #1,092
- “mm” frequency rank
- 27530
- confusion score
Side-by-Side Comparison
| Feature | millimètre | mm |
|---|---|---|
| Definition | Unité de mesure de longueur du Système international (SI), valant 10⁻³ mètre, et dont le symbole est mm. | Symbole du millimètre, unité de mesure de longueur du Système international (SI), valant 0,001 mètre (10⁻³ mètre). |
Same sound, different letters: millimètre vs mm
Muted letters are shared; highlighted letters are the only spelling cue when pronunciation matches. Shared run: 2 letters.
Same sound, different spelling - millimètre / mm
Say them out loud and nothing separates them: millimètre and mm carry the same recorded pronunciation, \mi.li.mɛtʁ\. Grammar is what tells them apart: one is anoun, the other asymbol, so most sentences will only accept one of them. They differ by 8 letter(s) in length. Our composite confusion score for this pair is 27530, derived from the frequency rank of both members and their visual similarity.
millimètre is recorded at frequency rank #26,438, classified as anoun, pronounced \mi.li.mɛtʁ\. mm is at rank #1,092, tagged as asymbol, pronounced \mi.li.mɛtʁ\.
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 27530, this pair ranks #328,377 of 440,172 scored French confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of millimètre vs mm
Shared letters: m. Private to "millimètre": eilrtè. Private to "mm": -.
"millimètre" · 10 letters · shape CVCCVCVCCV · "mm" · 2 letters · shape CC
Frequently Asked Questions
Is swapping "millimètre" for "mm" ever safe?
Frequency check: "millimètre" vs "mm" - which ranks higher?
After this comparison
Sound matches; spelling doesn't. Use the exits below to lock the right form or check a cousin pair.
- Full dictionary entry for "millimètre" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "mm" - compare definitions side by side with the headword page. Word entry
- This pair ranks #328,377 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
- "millimètre" and "mm" also get mixed up with nearby pairs, the highest-scored neighbour is "mm vs MWh". Nearby pair
Confusion rank #328,377 of 440,172 scored French pairs, corpus vintage 2026-09-03, not spelling advice.