# castor vs custom

> English confusable word pair

## The two words

### castor
*noun · IPA /ˈkɑːs.tə/ · frequency rank #22,921*
A hat made from the fur of the beaver.

### custom
*noun · IPA /ˈkʌstəm/ · frequency rank #3,421*
Frequent repetition of the same behavior; way of behavior common to many; ordinary manner; habitual practice; method of doing, living or behaving.

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