# MO vs mum

> English confusable word pair

## The two words

### MO
*noun · frequency rank #3,770*
Initialism of modus operandi.

### mum
*noun · IPA /mʌm/ · frequency rank #3,573*
Mother.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-09-03.
Canonical page: https://plainspell.com/en/vs/mo-vs-mum