# EP vs err

> English confusable word pair

## The two words

### EP
*noun · frequency rank #5,033*
Initialism of extreme pressure, an indicator used in lubricant additives.

### err
*verb · IPA /ɜː/ · frequency rank #17,359*
To make a mistake.

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