craziness vs clowning

craziness and clowning both are nouns.

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

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

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

craziness (noun)	clowning (noun)
foolish or senseless behavior	acting like a clown or buffoon
the quality of being rash and foolish	a comic incident or series of incidents
informal terms for insanity