# NP vs NSF

> English confusable word pair

## The two words

### NP
*noun · frequency rank #13,570*
Initialism of notary public.

### NSF
*name · frequency rank #27,233*
Initialism of National Science Foundation.

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