# slack vs stack

> English confusable word pair

## The two words

### slack
*noun · IPA /slæk/ · frequency rank #11,118*
The part of anything that hangs loose, having no strain upon it.

### stack
*noun · IPA /stæk/ · frequency rank #6,626*
A pile.

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