# delirious vs delirium

> English confusable word pair

## The two words

### delirious
*adjective · IPA /dɪˈlɪə̯.ɹi.əs/ · frequency rank #30,757*
Being in the state of delirium.

### delirium
*noun · IPA /dɪˈlɪ.ɹi.əm/ · frequency rank #30,391*
A temporary mental state with a sudden onset, usually reversible, including symptoms of confusion, inability to concentrate, disorientation, anxiety, and sometimes hallucinations. Causes can include dehydration, drug intoxication, and severe infection.

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