# MP4 vs mph

> 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.

### mph
*noun · IPA /ˌɛmpiˈeɪt͡ʃ/ · frequency rank #6,813*
Initialism of mile(s) per hour.

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