# filter vs foster

> English confusable word pair

## The two words

### filter
*noun · IPA /ˈfɪltə/ · frequency rank #4,449*
A device which separates a suspended, dissolved, or particulate matter from a fluid, solution, or other substance; any device that separates one substance from another.

### foster
*adjective · IPA /ˈfɒs.tə/ · frequency rank #4,085*
Providing parental care to children not related to oneself.

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