# Tu vs tuff

> English confusable word pair

## The two words

### Tu
*name · frequency rank #10,301*
A surname from Chinese.

### tuff
*noun · IPA /tʌf/ · frequency rank #29,499*
A light porous rock, now especially a rock composed of compacted volcanic ash varying in size from fine sand to coarse gravel.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-09-03.
Canonical page: https://plainspell.com/en/vs/tu-vs-tuff