unbalanced vs crazy

unbalanced is not a noun while crazy is a noun.

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

As adjectives, unbalanced and crazy are synonyms defined as:

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

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

unbalanced (adjective)	crazy (adjective)
being or thrown out of equilibrium	intensely enthusiastic about or preoccupied with
affected with madness or insanity	possessed by inordinate excitement
debits and credits are not equal	foolish; totally unsound
	affected with madness or insanity
	bizarre or fantastic