# so's vs SOS

> English confusable word pair

## The two words

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

### SOS
*noun · IPA /ˌɛs.əʊˈɛs/ · frequency rank #18,189*
The conventional Morse code call made by a ship in distress.

## 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-sos