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
Wildly excited or uncontrolled due to worry or fear
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Adjective
(slang) Impressively bold or daring
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Adjective
Having little or no sense, use, or purpose
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Adjective
To be continuously haunted or possessed by something, especially negative emotions, ideas or desires
Adjective
Severe or harsh in nature
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Noun
(rare) Demented people
Noun
An eccentric or unusual person
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