# Epo vs ex

> English confusable word pair

## The two words

### Epo
*noun · frequency rank #47,607*
Initialism of erythropoietin.

### 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: 2026-09-03.
Canonical page: https://plainspell.com/en/vs/epo-vs-ex