# mule vs must

> English confusable word pair

## The two words

### mule
*noun · IPA /mjuːl/ · frequency rank #16,279*
The generally sterile male or female hybrid offspring of a male donkey and a female horse.

### must
*verb · IPA /məst/ · frequency rank #198*
To do as a requirement; indicates that the sentence subject is required as an imperative or directive to execute the sentence predicate, with failure to do so resulting in a failure or negative consequence.

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