Synonyms of idiocy

idiocy

noun

ˈi-dē-ə-sē 

as in insanity

a foolish act or idea

trying to get that many people to agree on anything was pure idiocy

Synonyms & Similar Words

• insanity
• absurdity
• stupidity
• madness
• inanity
• imbecility
• bêtise
• lunacy
• foppery
• asininity
• folly
• foolery
• fatuity
• craziness
• absurdness
• blunder
• buffoonery
• tomfoolery
• foolishness
• nonsense
• witlessness
• twaddle
• senselessness
• inaneness
• shenanigan(s)
• drivel
• monkeyshine(s)
• bungle
• flub
• goof
• howler
• humbug

Antonyms & Near Antonyms

• wisdom
• discretion
• prudence
• sagacity
• forethought
• inspiration
• brainstorm

Example Sentences

Recent Examples of idiocy

Unlike its sibling concepts of dumbness and idiocy, stupidity isn’t really a personality trait. — Jonny Thomson, Big Think, 11 Feb. 2026

Harry and Finis refused to play Jack Donahoe’s game of commenting on every idiocy that came across their desks. — Literary Hub, 27 Jan. 2026

Advertisement Aster keenly satirizes Joe’s idiocy in the face of social upheaval through the iconography of Westerns. — Robert Daniels, Time, 10 Oct. 2025

But my naivete and idiocy about what this was going to take was staggering to me just six months later. — Scott Feinberg, HollywoodReporter, 19 Aug. 2025