# b4 vs BMP

> English confusable word pair

## The two words

### b4
*preposition · frequency rank #28,122*
Alternative letter-case form of B4 (“before”).

### BMP
*name · frequency rank #42,550*
Initialism of Basic Multilingual Plane, one of the sets of character codepoints in Unicode, formally known as Plane 0; the conventional full set of all characters in basic Unicode, using the 65,536-codepoint range from U+0000 through U+FFFF.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/vs/b4-vs-bmp