# ko vs koji

> English confusable word pair

## The two words

### ko
*noun · IPA /ˈkəʊ/ · frequency rank #10,717*
A local shape to which the ko rule applies; a ko shape.

### koji
*noun · IPA /ˈkoʊd͡ʒi/ · frequency rank #46,016*
A substance that is produced by letting a mold, especially Aspergillus oryzae, grow on rice, barley, soybeans, etc., used to make fermented products such as sake, amazake, miso, and soy sauce.

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