# erg vs ex

> English confusable word pair

## The two words

### erg
*noun · IPA /ɜːɡ/ · frequency rank #48,222*
A unit of work or energy, being the amount of work done by a force of one dyne applied through a distance of one centimeter. Equal to 10⁻⁷ joules.

### 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/erg-vs-ex