# N2

> English word · Noun · frequency rank #29,752

## Definitions
1. 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.
2. Alternative form of N₂.

## Easily confused with
- **na** (https://plainspell.com/en/vs/n2-vs-na)
- **NC** (https://plainspell.com/en/vs/n2-vs-nc)
- **ne** (https://plainspell.com/en/vs/n2-vs-ne)
- **NJ** (https://plainspell.com/en/vs/n2-vs-nj)
- **ni** (https://plainspell.com/en/vs/n2-vs-ni)
- **Ng** (https://plainspell.com/en/vs/n2-vs-ng)
- **nm** (https://plainspell.com/en/vs/n2-vs-nm)
- **NZ** (https://plainspell.com/en/vs/n2-vs-nz)
- **NT** (https://plainspell.com/en/vs/n2-vs-nt)
- **nd** (https://plainspell.com/en/vs/n2-vs-nd)
- **NP** (https://plainspell.com/en/vs/n2-vs-np)
- **nu** (https://plainspell.com/en/vs/n2-vs-nu)
- **NL** (https://plainspell.com/en/vs/n2-vs-nl)
- **nr** (https://plainspell.com/en/vs/n2-vs-nr)
- **NB** (https://plainspell.com/en/vs/n2-vs-nb)
- **NN** (https://plainspell.com/en/vs/n2-vs-nn)
- **not** (https://plainspell.com/en/vs/n2-vs-not)
- **new** (https://plainspell.com/en/vs/n2-vs-new)
- **now** (https://plainspell.com/en/vs/n2-vs-now)
- **non** (https://plainspell.com/en/vs/n2-vs-non)

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