frivolity vs foolery

frivolity and foolery both are nouns.

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

As nouns, foolery is a hypernym of frivolity; that is, foolery is a word with a broader meaning than frivolity:

Other hypernyms of frivolity include craziness, folly, indulgence, lunacy, tomfoolery.

frivolity (noun)	foolery (noun)
acting like a clown or buffoon	foolish or senseless behavior
something of little value or significance
the trait of being frivolous; not serious or sensible