craziness vs crazy

craziness and crazy both are nouns.

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

craziness (noun)	crazy (noun)
foolish or senseless behavior	someone deranged and possibly dangerous
the quality of being rash and foolish
informal terms for insanity

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