# chi vs CO2

> German confusable word pair

## The two words

### chi
*pronoun · IPA [ki] · frequency rank #14,264*
wer

### CO2
*noun · IPA [ˌt͡seːoˈt͡svaɪ̯] · frequency rank #4,186*
chemische Summenformel von Kohlendioxid

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/de/vs/chi-vs-co2