# N2 vs na

> English confusable word pair

## The two words

### N2
*noun · frequency rank #29,752*
The rotational speed of the high-pressure spool of a two-spool gas turbine engine or the intermediate-pressure spool of a three-spool gas turbine engine, expressed as a percentage of a certain reference rotational speed.

### na
*adverb · IPA /nɑː/ · frequency rank #3,512*
Not.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/vs/n2-vs-na