# MP4 vs Mx

> English confusable word pair

## The two words

### MP4
*noun · frequency rank #26,176*
Abbreviation of MPEG-4 Part 14, a file format for playing music and videos.

### Mx
*noun · IPA /mɪks/ · frequency rank #18,635*
A gender-neutral title used instead of Mr (Mister), Mrs (Mistress), etc.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/vs/mp4-vs-mx