mervsmsWhich spelling fits?

Quick tell: mer is a noun, ms is a symbol, so they fill different roles in a sentence.

Which to use

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

#657
“mer” frequency rank
#6,112
“ms” frequency rank
6769
confusion score

Side-by-Side Comparison

Feature mer ms
Definition Vaste étendue d’eau salée qui baigne les diverses parties de la terre. Symbole de la milliseconde, unité de mesure de temps du Système international (SI), valant 10⁻³ seconde.

Letter map: mer vs ms

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

3 ch
mer
2 ch
ms

Role in the sentence - mer and ms

Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: mer is anoun and msasymbol. On the page they differ by 1 letter(s) in length. Our composite confusion score for this pair is 6769, derived from the frequency rank of both members and their visual similarity.

mer is recorded at frequency rank #657, classified as anoun, pronounced \mɛʁ\. ms is at rank #6,112, tagged as asymbol.

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 6769, this pair ranks #425,287 of 440,172 scored French confusable pairs - a relatively easy-to-tell-apart pair.

Orthographic DNA of mer vs ms

Shared letters: m. Private to "mer": er. Private to "ms": s.

"mer" · 3 letters · shape CVC  ·  "ms" · 2 letters · shape CC

Frequently Asked Questions

Can "mer" and "ms" be used interchangeably?
No - they are not even the same part of speech. "mer" is a noun and "ms" a symbol, so a sentence built for one is usually ungrammatical with the other.
Which is more common, "mer" or "ms"?
"mer" is the more common of the two: it sits at frequency rank #657 in our French list, against #6,112 for "ms". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

What to do next

Done with this confusable. These links stay specific to "mer" and "ms".

  • Full dictionary entry for "mer" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "ms" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #425,287 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
  • "mer" and "ms" also get mixed up with nearby pairs, the highest-scored neighbour is "ms vs MWh". Nearby pair

Confusion rank #425,287 of 440,172 scored French pairs, corpus vintage 2026-09-03, not spelling advice.

Source: Wiktionary (via kaikki.org) Structured Wiktionary extract

Source: FrequencyWords open word-frequency list