# X vs XYZ

> English confusable word pair

## The two words

### X
*num · IPA /ɛks/ · frequency rank #647*
An unknown quantity or unknown value.

### XYZ
*noun · IPA /ˌɛks.waɪˈzɛd/ · frequency rank #34,754*
The color space of the tristimulus values X, Y, and Z.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-09-02.
Canonical page: https://plainspell.com/en/vs/x-vs-xyz