foolery vs lunacy

foolery and lunacy both are nouns.

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

As nouns, foolery and lunacy are synonyms defined as:

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

foolery (noun)	lunacy (noun)
foolish or senseless behavior	foolish or senseless behavior
	obsolete terms for legal insanity