# nuclei vs nucleus

> English confusable word pair

## The two words

### nuclei
*noun · IPA /ˈnjuː.kli.aɪ/ · frequency rank #22,751*
plural of nucleus

### nucleus
*noun · IPA /ˈnjuː.kli.əs/ · frequency rank #13,203*
The core, central part of something, around which other elements are assembled.

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