# constant vs constraint

> English confusable word pair

## The two words

### constant
*adjective · IPA /ˈkɒnstənt/ · frequency rank #2,781*
Unchanged through time or space; permanent.

### constraint
*noun · IPA /kənˈstɹeɪnt/ · frequency rank #20,072*
Something that constrains; a restriction.

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