What is another word for insane?

Need synonyms for insane? Here's a list of similar words from our thesaurus that you can use instead.

Adjective
In a degenerative state of mind which prevents normal perception, behavior, or social interaction
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“His men could possibly die on the assumptions of an insane professor who had been fired from his teaching post for these very same beliefs.”
Adjective
Stupidly irresponsible
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“For you to trust someone claiming to be a Nigerian prince is completely insane.”
Adjective
Extremely angry or annoyed
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“The constant hammering would cause Lawrence to go insane.”
Adjective
Excessive in degree or amount
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“He wanted an insane amount of money just to paint our kitchen.”
Adjective
(slang) Impressively bold or daring
Adjective
Extremely tall, especially in comparison with the surroundings
Adjective
To be continuously haunted or possessed by something, especially negative emotions, ideas or desires
Noun
(rare) Demented people
Noun
An eccentric or unusual person
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