# ies vs IRB

> English confusable word pair

## The two words

### ies
*noun · frequency rank #45,988*
plural of i, the name of the letter I.

### IRB
*noun · frequency rank #33,690*
Initialism of institutional review board, a committee that reviews the designs of proposed experiments to confirm whether all the methods proposed are ethical.

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