# Cao vs cyan

> English confusable word pair

## The two words

### Cao
*name · frequency rank #22,312*
A state of ancient China during the Zhou dynasty.

### cyan
*noun · IPA /ˈsaɪˌæn/ · frequency rank #41,072*
An additive secondary colour midway between green and blue, evoked by wavelengths between ~490 and ~520 nm.

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