# cis vs CSX

> 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.

### CSX
*name · IPA /ˈsi.ɛsˌɛks/ · frequency rank #48,688*
CSX Transportation, an American Class I freight railroad that operates in the eastern United States and in the southern parts of Ontario and Québec. Its chief competitor is the Norfolk Southern Railway. This railroad formed from a merger with the Chessie System and Seaboard System railroads in the nineteen eighties.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-09-02.
Canonical page: https://plainspell.com/en/vs/cis-vs-csx