# eff vs em

> English confusable word pair

## The two words

### eff
*noun · IPA /ɛf/ · frequency rank #17,352*
Alternative spelling of ef; the name of the Latin script letter F/f.

### em
*noun · IPA /ˈɛm/ · frequency rank #2,623*
The name of the Latin script letter M/m.

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