# cis vs con

> English confusable word pair

## The two words

### cis
*adjective · IPA /sɪs/ · frequency rank #13,115*
Having two mutations on two genes on the same chromosome of a homologous pair.

### con
*verb · IPA /kɒn/ · frequency rank #4,434*
To study or examine carefully, especially in order to gain knowledge of; to learn, or learn by heart.

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