craziness vs frivolity

craziness and frivolity both are nouns.

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

As nouns, frivolity is a hyponym of craziness; that is, frivolity is a word with a more specific, narrower meaning than craziness:

Other hyponyms of craziness include meshugaas, mishegaas, mishegoss, buffoonery, clowning, harlequinade, japery, prank.

craziness (noun)	frivolity (noun)
foolish or senseless behavior	acting like a clown or buffoon
the quality of being rash and foolish	something of little value or significance
informal terms for insanity	the trait of being frivolous; not serious or sensible