# diagnose vs diagnosis

> English confusable word pair

## The two words

### diagnose
*verb · IPA /ˈdʌɪ.əɡˌnəʊz/ · frequency rank #16,889*
To determine which disease is causing a sick person's signs and symptoms; to find the diagnosis.

### diagnosis
*noun · IPA /daɪəɡˈnəʊsɪs/ · frequency rank #5,121*
The process of, or an instance of, identification of the nature and cause of a medical condition or illness.

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