# K9 vs KB

> English confusable word pair

## The two words

### K9
*noun · IPA /ˈkeɪnaɪn/ · frequency rank #36,625*
A trained police dog.

### KB
*noun · frequency rank #15,644*
Initialism of knowledge base.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/vs/k9-vs-kb