# rigor vs rotor

> English confusable word pair

## The two words

### rigor
*noun · IPA /ˈɹɪɡɚ/ · frequency rank #26,577*
US spelling of rigour.

### rotor
*noun · IPA /ˈɹəʊ.tə/ · frequency rank #16,789*
A rotating part of a mechanical device; for example, in an electric motor, generator, alternator, or pump.

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