# XML vs XO

> English confusable word pair

## The two words

### XML
*name · frequency rank #20,020*
Initialism of Extensible Markup Language, a flexible text format for creating structured computer documents in machine-readable form.

### XO
*noun · frequency rank #24,641*
Alternative letter-case form of xo (“hugs and kisses”).

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