# ICD vs IK

> English confusable word pair

## The two words

### ICD
*noun · frequency rank #34,926*
Initialism of implantable cardioverter-defibrillator.

### IK
*phrase · frequency rank #18,585*
Initialism of I know.

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