unhinged vs crazy

unhinged is not a noun while crazy is a noun.

Word	Noun	Adjective	Verb	Adverb
unhinged	No	Yes	No	No
crazy	Yes	Yes	No	No

As adjectives, unhinged and crazy are synonyms defined as:

Other synonyms of unhinged include brainsick, demented, disturbed, mad, sick, unbalanced.

unhinged (noun)	crazy (noun)
	someone deranged and possibly dangerous

unhinged (adjective)	crazy (adjective)
affected with madness or insanity	intensely enthusiastic about or preoccupied with
	possessed by inordinate excitement
	foolish; totally unsound
	affected with madness or insanity
	bizarre or fantastic