# rex vs RH

> English confusable word pair

## The two words

### rex
*noun · IPA /ˈɹɛks/ · frequency rank #8,478*
A king, particularly in ancient Rome.

### RH
*noun · frequency rank #19,438*
Initialism of relative humidity.

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