# basis vs bis

> English confusable word pair

## The two words

### basis
*noun · IPA /ˈbeɪ.sɪs/ · frequency rank #1,626*
A physical base or foundation.

### bis
*noun · IPA /baɪz/ · frequency rank #18,497*
plural of bi

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