# eff vs ex

> 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.

### ex
*noun · IPA /ɛks/ · frequency rank #1,633*
The name of the Latin script letter X/x.

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