Which to use
“m” is a character and “mu” is a noun - they look or sound alike but fill different roles in a sentence.
- #401
- “m” frequency rank
- #11,427
- “mu” frequency rank
- 11828
- confusion score
Side-by-Side Comparison
| Feature | m | mu |
|---|---|---|
| Definition | The thirteenth letter of the English alphabet, called em and written in the Latin script. | The 12th letter of the Modern Greek alphabet. |
Where the eye mixes m and mu
Muted = shared; highlighted = the visual trap. They share 1 letter in sequence.
Why the eye confuses m with mu
These two trip readers on the page rather than in the ear: m is /ɛm/ while mu is /mjuː/. Spoken aloud the problem disappears. In writing it persists, because they differ by 1 extra letter(s) - “m” sits inside “mu”, and the parts of speech differ too (character vs noun), which is usually the fastest check. Our composite confusion score for this pair is 11828, derived from the frequency rank of both members and their visual similarity.
m is recorded at frequency rank #401, classified as acharacter, pronounced /ɛm/. mu is at rank #11,427, tagged as anoun, pronounced /mjuː/.
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 11828, this pair ranks #484,917 of 530,003 scored English confusable pairs - a relatively easy-to-tell-apart pair.
Orthographic DNA of m vs mu
Shared letters: m. Private to "m": -. Private to "mu": u.
"m" · 1 letters · shape C · "mu" · 2 letters · shape CV
Frequently Asked Questions
Do "m" and "mu" mean the same thing in a sentence?
Frequency check: "m" vs "mu" - which ranks higher?
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 "m" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "mu" - compare definitions side by side with the headword page. Word entry
- This pair ranks #484,917 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "m" and "mu" also get mixed up with nearby pairs, the highest-scored neighbour is "MMP vs mu". Nearby pair
Confusion rank #484,917 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.