# ppm vs PST

> English confusable word pair

## The two words

### ppm
*noun · frequency rank #23,949*
Initialism of parts per million (10000 ppm = 1%).

### PST
*name · frequency rank #19,948*
Initialism of Pacific Standard Time.

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