# codex vs convex

> English confusable word pair

## The two words

### codex
*noun · IPA /ˈkəʊdɛks/ · frequency rank #22,932*
An early manuscript book.

### convex
*adjective · IPA /ˈkɒn.vɛks/ · frequency rank #20,597*
Curved or bowed outward like the outside of a bowl, circle, or sphere.

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