Which to use
“mer” is a noun and “mm” is an abbrev - they look or sound alike but fill different roles in a sentence.
- #10,134
- “mer” frequency rank
- #1,186
- “mm” frequency rank
- 11320
- confusion score
Side-by-Side Comparison
| Feature | mer | mm |
|---|---|---|
| Definition | das Meer, die See | Einheitensymbol für Millimeter |
Letter map: mer vs mm
Shared letters muted; letters that set mer and mm apart highlighted. Shared run: 1.
Role in the sentence - mer and mm
Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: mer is anoun and mmanabbrev. On the page they differ by 1 letter(s) in length. Our composite confusion score for this pair is 11320, derived from the frequency rank of both members and their visual similarity.
mer is recorded at frequency rank #10,134, classified as anoun, pronounced [mεːʀ]. mm is at rank #1,186, tagged as anabbrev.
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 11320, this pair ranks #1,970,503 of 2,006,359 scored German confusable pairs - a relatively easy-to-tell-apart pair.
Orthographic DNA of mer vs mm
Shared letters: m. Private to "mer": er. Private to "mm": -.
"mer" · 3 letters · shape CVC · "mm" · 2 letters · shape CC
Frequently Asked Questions
Is swapping "mer" for "mm" ever safe?
Frequency check: "mer" vs "mm" - which ranks higher?
Useful next steps
Pair "mer" vs "mm" is on the table, pick a follow-up below.
- Full dictionary entry for "mer" 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 #1,970,503 of 2,006,359 scored German confusable pairs in this corpus vintage. Corpus statistics
- "mer" and "mm" also get mixed up with nearby pairs, the highest-scored neighbour is "mer vs mora". Nearby pair
Confusion rank #1,970,503 of 2,006,359 scored German pairs, corpus vintage 2026-09-03, not spelling advice.