# IK vs io

> English confusable word pair

## The two words

### IK
*phrase · frequency rank #18,585*
Initialism of I know.

### io
*noun · IPA /ˈaɪəʊ/ · frequency rank #16,946*
A type of moth, the io moth.

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