# inert vs inertia

> English confusable word pair

## The two words

### inert
*adjective · IPA /ɪnˈɜːt/ · frequency rank #25,796*
Unable to move or act; inanimate.

### inertia
*noun · IPA /ɪnˈɜː.ʃə/ · frequency rank #23,313*
The property of a body that resists any change to its uniform motion; equivalent to its mass.

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