# rest vs ROS

> English confusable word pair

## The two words

### rest
*noun · IPA /ɹɛst/ · frequency rank #594*
Relief from work or activity by sleeping; sleep.

### ROS
*noun · frequency rank #19,685*
Abbreviation of reactive oxygen species.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-09-02.
Canonical page: https://plainspell.com/en/vs/rest-vs-ros