UNREASON Synonyms: 26 Similar and Opposite Words

unreason

noun

Definition of unreason

as in dementia

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Recent Examples of unreason Reason had to triumph in all things, or else waves of unreason, of which the Muckers were a model, would insinuate themselves into daily life. — Adam Gopnik, New Yorker, 17 Aug. 2026 In that book, his characters confront the decline of American public speech—its degeneration into varieties of unreason and the proto-fascist violence that follows. — Nicholas Dames, The Atlantic, 7 Apr. 2026 For all Eggers’s dramatization of unreason, his images sit heavily onscreen awaiting something more significant than mere admiration—interpretation. — Richard Brody, The New Yorker, 23 Dec. 2024 Like many politicians, Khan is trying to reason with a maelstrom of unreason. — Peter Guest, WIRED, 26 Mar. 2024 The country has entered what can only be characterized as an age of unreason, with large swaths of its population embracing wild conspiracy theories. — Jonathan Kirshner, Foreign Affairs, 29 Jan. 2021

Recent Examples of Synonyms for unreason

Noun

Teri passed away in October 2012 after a long illness due to dementia.

— Ashley Hume, FOXNews.com, 18 Aug. 2026
Earlier research indicated that estrogen-only HRT might actually increase dementia risk, especially if started after age 65.

— Helen Carefoot, Flow Space, 18 Aug. 2026

Definition of dementia

Noun

Clancy, 36, has pleaded not guilty by reason of insanity to three counts of murder in the killings of her children Cora, 5; Dawson, 3; and Callan, 8 months.

— Nicki Brown, CNN Money, 24 Aug. 2026
While known as lacking criminal responsibility under Massachusetts law, the defense is more commonly referred to as not guilty by reason of insanity.

— Melina Khan, USA Today, 24 Aug. 2026

Definition of insanity

Noun

Postpartum psychosis is a rare but serious medical emergency characterized by severe, rapid onset psychiatric episodes such as mania, depression, delusions or hallucinations.

— Peter Charalambous, ABC News, 17 Aug. 2026
Symptoms include anxiety, hypervigilance, confusion and mania, and taking on activities that might be considered strange.

— Deborah Becker, NPR, 16 Aug. 2026