# sludge vs slug

> English confusable word pair

## The two words

### sludge
*noun · IPA /slʌd͡ʒ/ · frequency rank #21,661*
Solids separated from suspension in a liquid.

### slug
*noun · IPA /slʌɡ/ · frequency rank #19,465*
Any of many gastropod mollusks, having no (or only a rudimentary) shell.

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