# rex vs Rio

> English confusable word pair

## The two words

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

### Rio
*name · IPA /ˈɹioʊ/ · frequency rank #3,977*
Clipping of Rio de Janeiro.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-09-03.
Canonical page: https://plainspell.com/en/vs/rex-vs-rio