# modulus vs modus

> English confusable word pair

## The two words

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

### modus
*noun · IPA /ˈməʊdəs/ · frequency rank #31,659*
The arrangement of, or mode of expressing, the terms of a contract or conveyance.

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