lunacy vs craziness

lunacy and craziness both are nouns.

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

As nouns, lunacy and craziness are synonyms defined as:

Other synonyms of lunacy include folly, foolery, indulgence, tomfoolery.

lunacy (noun)	craziness (noun)
foolish or senseless behavior	foolish or senseless behavior
obsolete terms for legal insanity	the quality of being rash and foolish
	informal terms for insanity