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

The morning of the wedding could be spent escaping the madness for a moment of peace among the trees, or arranging a pre-wedding morning coffee overlooking the estate.

— Olivia Morelli, Condé Nast Traveler, 12 Aug. 2026
Back in King’s Landing, Rhaenyra comes to find that her prisoner Helaena has taken her own life but left a parting gift for the queen that foreshadows a potential prophecy of Rhaenyra’s path towards madness.

— Justin Kroll, Deadline, 9 Aug. 2026

Definition of madness

Noun

Yates was eventually found not guilty by reason of insanity and remains committed to a state mental health facility.

— Deborah Becker, NPR, 16 Aug. 2026
Ulrich plays the enigmatic and manipulative cult leader, who pleads insanity and claims to be taking his commands directly from God.

— Matt Grobar, Deadline, 13 Aug. 2026

Definition of insanity

Noun

People who report a history of sleep loss that triggers mania are much more likely to develop postpartum psychosis, and a person with a previous experience with postpartum psychosis is more likely to have it again.

— Jen Christensen, CNN Money, 13 Aug. 2026
Dukes told jurors that Clancy expressed concerns about being addicted to benzodiazepines, but did not show obvious signs of mania or psychosis.

— ABC News, ABC News, 12 Aug. 2026