# mass vs MSM

> English confusable word pair

## The two words

### mass
*noun · IPA /mæs/ · frequency rank #1,428*
Matter, material.

### MSM
*noun · frequency rank #20,171*
Initialism of methylsulfonylmethane.

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