# PSA

> English word · Noun · frequency rank #15,483

## Definitions
1. Initialism of polysialic acid.
2. Initialism of prostate-specific antigen.
3. Initialism of pressure-sensitive adhesive.
4. Initialism of pressure swing adsorption.
5. Initialism of public safety announcement.
6. Initialism of public service announcement.
7. Initialism of purchase and sale agreement.

## Etymology
English initialisms.

## Easily confused with
- **pt** (https://plainspell.com/en/vs/psa-vs-pt)
- **PU** (https://plainspell.com/en/vs/psa-vs-pu)
- **PV** (https://plainspell.com/en/vs/psa-vs-pv)
- **PW** (https://plainspell.com/en/vs/psa-vs-pw)
- **PX** (https://plainspell.com/en/vs/psa-vs-px)
- **put** (https://plainspell.com/en/vs/psa-vs-put)
- **pub** (https://plainspell.com/en/vs/psa-vs-pub)
- **pup** (https://plainspell.com/en/vs/psa-vs-pup)
- **pun** (https://plainspell.com/en/vs/psa-vs-pun)
- **PTS** (https://plainspell.com/en/vs/psa-vs-pts)
- **psi** (https://plainspell.com/en/vs/psa-vs-psi)
- **PSG** (https://plainspell.com/en/vs/psa-vs-psg)
- **PST** (https://plainspell.com/en/vs/psa-vs-pst)
- **PSP** (https://plainspell.com/en/vs/psa-vs-psp)
- **PVC** (https://plainspell.com/en/vs/psa-vs-pvc)
- **pug** (https://plainspell.com/en/vs/psa-vs-pug)
- **PTA** (https://plainspell.com/en/vs/psa-vs-pta)
- **PvP** (https://plainspell.com/en/vs/psa-vs-pvp)
- **pus** (https://plainspell.com/en/vs/psa-vs-pus)
- **PSU** (https://plainspell.com/en/vs/psa-vs-psu)

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