# module vs modulus

> English confusable word pair

## The two words

### module
*noun · IPA /ˈmɒd͡ʒuːl/ · frequency rank #8,455*
A self-contained component of a system, often interchangeable, which has a well-defined interface to the other components.

### modulus
*noun · IPA /ˈmɒdjʊləs/ · frequency rank #39,433*
The base with respect to which a congruence is computed.

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