# ERP vs err

> English confusable word pair

## The two words

### ERP
*noun · frequency rank #28,194*
Initialism of effective radiated power or equivalent radiated power.

### 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/erp-vs-err