# SD vs so

> English confusable word pair

## The two words

### SD
*name · frequency rank #8,482*
Initialism of South Dakota: a state of the United States.

### so
*conjunction · IPA /səʊ/ · frequency rank #33*
Reduced form of 'so that', used to express purpose; in order that.

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