# sai vs su

> English confusable word pair

## The two words

### sai
*noun · IPA /saɪ/ · frequency rank #20,482*
A handheld weapon with three prongs, used in some Oriental martial arts.

### 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: 2026-05-06.
Canonical page: https://plainspell.com/en/vs/sai-vs-su