Which to use
“mah” is a determiner and “mm” is a symbol - they look or sound alike but fill different roles in a sentence.
- #34,174
- “mah” frequency rank
- #1,092
- “mm” frequency rank
- 35266
- confusion score
Side-by-Side Comparison
| Feature | mah | mm |
|---|---|---|
| Definition | Mon, ma. | Symbole du millimètre, unité de mesure de longueur du Système international (SI), valant 0,001 mètre (10⁻³ mètre). |
Where the eye mixes mah and mm
Muted = shared; highlighted = the visual trap. They share 1 letter in sequence.
Look-alike desk: mah vs mm
These two trip readers on the page rather than in the ear: mah is \mɑː\ while mm is \mi.li.mɛtʁ\. 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 (determiner vs symbol), which is usually the fastest check. Our composite confusion score for this pair is 35266, derived from the frequency rank of both members and their visual similarity.
mah is recorded at frequency rank #34,174, classified as adet, pronounced \mɑː\. 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 35266, this pair ranks #277,998 of 440,172 scored French confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of mah vs mm
Shared letters: m. Private to "mah": ah. Private to "mm": -.
"mah" · 3 letters · shape CVC · "mm" · 2 letters · shape CC
Frequently Asked Questions
Can "mah" and "mm" be used interchangeably?
Which is more common, "mah" or "mm"?
After this comparison
Visual near-miss handled. Browse the word pages or a neighbour when the next look-alike shows up.
- Full dictionary entry for "mah" 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 #277,998 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
- "mah" and "mm" also get mixed up with nearby pairs, the highest-scored neighbour is "mah vs MWh". Nearby pair
Confusion rank #277,998 of 440,172 scored French pairs, corpus vintage 2026-09-03, not spelling advice.