# calc vs Cao

> English confusable word pair

## The two words

### calc
*noun · IPA /kalk/ · frequency rank #32,718*
Abbreviation of calculus.

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

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