m vs mer, What's the Difference?

Which to use

“m” is a symbol and “mer” is a noun - they look or sound alike but fill different roles in a sentence.

#701
“m” frequency rank: #22,090
“mer” frequency rank: 22791
confusion score

Side-by-Side Comparison

Feature	m	mer
Definition	símbolo de metro	mar

Letter map: m vs mer

Shared letters muted; letters that set m and mer apart highlighted. Shared run: 1.

1 ch

3 ch

mer

Part-of-speech tell for m / mer

Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: m is asymbol and meranoun. On the page they differ by 2 extra letter(s) - “m” sits inside “mer”. Our composite confusion score for this pair is 22791, derived from the frequency rank of both members and their visual similarity.

m is recorded at frequency rank #701, classified as asymbol. mer is at rank #22,090, tagged as anoun, pronounced /mɛʁ/.

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 22791, this pair ranks #47,165 of 75,631 scored Portuguese confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of m vs mer

Shared letters: m. Private to "m": -. Private to "mer": er.

"m" · 1 letters · shape C · "mer" · 3 letters · shape CVC

Frequently Asked Questions

Can "m" and "mer" be used interchangeably?

No - they are not even the same part of speech. "m" is a symbol and "mer" a noun, so a sentence built for one is usually ungrammatical with the other.

In ordinary Portuguese text, does "m" or "mer" show up more?

"m" is the more common of the two: it sits at frequency rank #701 in our Portuguese list, against #22,090 for "mer". That is a wide gap, so in ordinary text the rarer spelling is the one worth double-checking.

After this comparison

Pair "m" vs "mer" is on the table, pick a follow-up below.

Full dictionary entry for "m" with definition, IPA, and generated misspellings. Word entry
Full dictionary entry for "mer" - compare definitions side by side with the headword page. Word entry
This pair ranks #47,165 of 75,631 scored Portuguese confusable pairs in this corpus vintage. Corpus statistics
"m" and "mer" also get mixed up with nearby pairs, the highest-scored neighbour is "maa vs mer". Nearby pair

Confusion rank #47,165 of 75,631 scored Portuguese pairs, corpus vintage 2026-09-03, not spelling advice.