Searching for synonyms for crazy? Here’s some similar words from our thesaurus you can use instead.

Synonyms

• loony informal or slang terms for mentally irregular; someone deranged and possibly dangerous
• looney someone deranged and possibly dangerous
• nutcase someone deranged and possibly dangerous
• weirdo someone unpleasantly strange or eccentric ; someone deranged and possibly dangerous

• “a man who had gone mad“

Synonyms

• brainsick affected with madness or insanity
• demented affected with madness or insanity
• disturbed having the place or position changed; afflicted with or marked by anxious uneasiness or trouble or grief; emotionally unstable and having difficulty coping with personal relationships ; affected with madness or insanity
• mad roused to anger; affected with madness or insanity; marked by uncontrolled excitement or emotion; very foolish
• sick people who are sick; eject the contents of the stomach through the mouth; affected by an impairment of normal physical or mental function; feeling nausea; affected with madness or insanity; having a strong distaste from surfeit; (of light) lacking in intensity or brightness; deeply affected by a strong feeling; shockingly repellent
• unbalanced being or thrown out of equilibrium ; affected with madness or insanity; debits and credits are not equal
• unhinged affected with madness or insanity

• “totally unsound“
• “a crazy scheme“
• “half-baked ideas“
• “a screwball proposal without a prayer of working“

Synonyms

• half-baked foolish; insufficiently cooked
• screwball foolish; a whimsically eccentric person ; a pitch with reverse spin that curves toward the side of the plate from which it was thrown
• softheaded foolish

• “the crowd went crazy“
• “was crazy to try his new bicycle“

• “had a crazy dream“
• “wore a crazy hat“

• “crazy about cars and racing“
• “they are dotty about each other“
• “gaga over the rock group’s new album“

Synonyms

• wild in an uncontrolled and rampant manner; in a wild or undomesticated manner; a wild primitive state untouched by civilization; a wild and uninhabited area left in its natural condition; marked by extreme lack of restraint or control; in a natural state; in a state of extreme emotion; deviating widely from an intended course; (of colors or sounds) intensely vivid or loud; without a basis in reason or fact; talking or behaving irrationally; involving risk or danger; fanciful and unrealistic; located in a dismal or remote area; intensely enthusiastic about or preoccupied with; without civilizing influences; (of the elements) as if showing violent anger
• dotty informal or slang terms for mentally irregular; intensely enthusiastic about or preoccupied with
• gaga mentally or physically infirm with age; intensely enthusiastic about or preoccupied with