# san vs su

> English confusable word pair

## The two words

### san
*noun · IPA /ˈsæn/ · frequency rank #1,148*
An Ancient Greek letter representing /s/ (uppercase Ϻ, lowercase ϻ), originally used in some dialects instead of sigma.

### su
*noun · frequency rank #8,094*
Alternative form of xu (“former Vietnamese currency”).

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