# mer vs MS

> English confusable word pair

## The two words

### mer
*noun · frequency rank #19,904*
A repeat unit: a structural unit which through repetition forms a polymer.

### MS
*name · frequency rank #2,167*
Abbreviation of Mato Grosso do Sul: a state of Brazil.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/vs/mer-vs-ms