# ppd vs PTSD

> English confusable word pair

## The two words

### ppd
*adjective · frequency rank #39,968*
Abbreviation of postpaid (“having the cost of postage already paid”).

### PTSD
*noun · frequency rank #14,195*
Initialism of post-traumatic stress disorder.

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