# NAS vs not

> English confusable word pair

## The two words

### NAS
*name · frequency rank #14,372*
Initialism of National Academy of Sciences (US).

### not
*adverb · IPA /nɒt/ · frequency rank #23*
Negates the meaning of the modified verb.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/vs/nas-vs-not