Synonyms of insanity

insanity

noun

in-ˈsa-nə-tē 

1

as in dementia

a serious mental disorder that prevents one from living a safe and normal life

his incurable insanity requires that he spend the rest of his life in a mental hospital

Synonyms & Similar Words

• dementia
• madness
• hysteria
• schizophrenia
• instability
• paranoia
• mania
• lunacy
• rage
• derangement
• aberration
• delusion
• psychosis
• neurosis
• frenzy
• irrationality
• delirium
• unreasonableness
• obsession
• abnormality
• phobia
• hallucination
• hypomania
• unsoundness
• senile dementia
• monomania
• hallucinosis
• dementedness

Antonyms & Near Antonyms

• sanity
• mind
• rationality
• reasonableness
• lucidity
• saneness
• normality
• soundness
• reasonability
• rationalness

2

as in absurdity

a foolish act or idea

everyone laughed at the latest insanity from the town eccentric

Synonyms & Similar Words

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

Antonyms & Near Antonyms

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

3

as in madness

lack of good sense or judgment

had the insanity to think that taking over a government building in protest of our foreign policy was a good idea

Synonyms & Similar Words

• madness
• simplicity
• absurdity
• craziness
• foolishness
• wackiness
• lunacy
• zaniness
• unwisdom
• imbecility
• nuttiness
• silliness
• daftness
• inanity
• stupidness
• fatuousness
• preposterousness
• stupidity
• dottiness
• witlessness
• folly
• brainlessness
• senselessness
• nonsensicalness
• asininity
• idiocy
• balminess
• fatuity
• dulness
• simpleness
• irrationality
• feeblemindedness
• dullness
• dippiness
• slowness
• unreasonableness
• obtuseness
• mindlessness
• ridiculousness
• dumbness
• simplemindedness
• dopiness
• denseness
• oafishness
• doltishness
• weirdness
• kookiness
• fallacy
• ludicrousness
• gormlessness
• vacuity
• dim-wittedness
• laughableness

Antonyms & Near Antonyms

• sanity
• wisdom
• soundness
• prudence
• sagacity
• rationality
• validity
• reasonableness
• sapience
• sensibleness
• reasonability
• logicality
• perception
• insight
• sagaciousness
• sageness
• discernment
• logicalness
• rationalness
• percipience

Examples of insanity in a Sentence

Recent Examples on the Web

Beltran had originally pleaded not guilty without an insanity claim. —Cameron MacDonald, The Mercury News, 30 Sep. 2024

Qualley texted videos of the insanity to her co-star. —Brian Truitt, USA TODAY, 21 Sep. 2024

As Canadians, and non-stand-ups, the hosts could not be expected to weigh in on the general insanity of this presidential election. —Meredith Blake, Los Angeles Times, 15 Sep. 2024

As the insanity of the situation intensifies, Mr. K becomes more and more desperate, and more and more isolated from and suspicious of those around him. —Marya E. Gates, IndieWire, 7 Sep. 2024