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

Researchers noted that many cases of dementia were not captured on death certificates, suggesting the burden of neurodegenerative disease among former players may be underestimated.

— Dr. Onaola Adedeji, ABC News, 25 Aug. 2026
Among Americans over the age of 55, the lifetime risk of eventually developing any form of dementia is 42%, one study published last year in the journal Nature Medicine found.

— Becky Sullivan, NPR, 25 Aug. 2026

Definition of dementia

Noun

Can a squad of scientists (including Kurt Russell) fight off madness and mayhem before the Thing overtakes them all?

— Beatrice Verhoeven, HollywoodReporter, 25 Aug. 2026
This week the madness leaps from the stage to the screen as Stamptown premieres its first Netflix special Tuesday.

— Deputy Entertainment, Los Angeles Times, 25 Aug. 2026

Definition of madness

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

What's your relationship to paparazzi and social media mania, given you’ve been in the spotlight for so long?

— Kalia Richardson, USA Today, 28 Aug. 2026
Other moviegoers adored his campy but somehow restrained mania as the butler in Clue, or delighted in his nasty smarm as the concierge in Home Alone 2.

— Tom Nichols, The Atlantic, 26 Aug. 2026

Definition of mania

Noun

Symptoms of postpartum psychosis can include delusions or hallucinations that can prompt suicidal or homicidal action, according to the American College of Obstetricians and Gynecologists.

— ABC News, ABC News, 28 Aug. 2026
That’s the sign of an overmatched team, and one that should be far, far away from any delusions of postseason grandeur.

— Grant Brisbee, New York Times, 25 Aug. 2026