# pos vs PSA

> English confusable word pair

## The two words

### pos
*adjective · IPA /pɒz/ · frequency rank #11,268*
Clipping of positive.

### PSA
*noun · frequency rank #15,483*
Initialism of polysialic acid.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-09-03.
Canonical page: https://plainspell.com/en/vs/pos-vs-psa