# so's vs sou

> English confusable word pair

## The two words

### so's
*contraction · frequency rank #38,171*
So that, in order that.

### sou
*noun · IPA /suː/ · frequency rank #35,525*
An old French copper coin equal to one twentieth of a livre or twelve deniers; one sou is to the livre as one shilling is to the pound.

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