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

Brain disease in dogs and people Our work on aging dogs all began with a desire to develop better treatments for dementia.

— Julie Moreno, The Conversation, 6 Oct. 2026
However, among individuals who already had dementia, glucosamine users had a higher mortality compared to similar non-users.

— Shiv Sudhakar, FOXNews.com, 5 Oct. 2026

Definition of dementia

Noun

The director likens his own role on the trip to that of Bill, who is slowly driven to madness by worrying about a particular child, the class punching bag Kenneth (Olof Olingdahl).

— Lily Ford, HollywoodReporter, 29 Sep. 2026
Common sense gun regulations are the only hope for reversing this madness.

— Dan Sweeney, Sun Sentinel, 22 Sep. 2026

Definition of madness

Noun

Counsel was enraged that his gambit was foiled by one jury holdout on the insanity argument.

— Voice of the People, New York Daily News, 2 Oct. 2026
Prosecutors questioned the schizophrenia diagnosis and pointed out that suffering from mental illness is not the same as meeting the legal standard of insanity.

— Clara Harter, Los Angeles Times, 1 Oct. 2026

Definition of insanity

Noun

The Mayo Clinic defines the mental health condition as typically marked by hallucinations, delusions, depression, and mania.

— Leigh Blickley, Entertainment Weekly, 29 Sep. 2026
The 57-year-old star kept the animal print mania going with her pointed-toe fuzzy leopard print slingback heels and held a microscopic black patent leather bag in one hand.

— Lara Walsh, InStyle, 23 Sep. 2026

Definition of mania

Noun

The Mayo Clinic defines the mental health condition as typically marked by hallucinations, delusions, depression, and mania.

— Leigh Blickley, Entertainment Weekly, 29 Sep. 2026
Hill became increasingly paranoid and developed delusions that she was being surveilled.

— Rebecca White, New York Daily News, 28 Sep. 2026

Definition of delusion

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“Unreason.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/unreason. Accessed 7 Oct. 2026.

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