# rad vs radon

> English confusable word pair

## The two words

### rad
*adjective · IPA /ɹæd/ · frequency rank #15,039*
Clipping of radical (“excellent”).

### radon
*noun · IPA /ˈɹeɪdɒn/ · frequency rank #33,384*
The chemical element (symbol Rn, formerly Ro) with atomic number 86. It is an odorless, colorless, chemically inert but radioactive noble gas.

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