screwball vs flake

screwball and flake both are nouns.

Word	Noun	Adjective	Verb	Adverb
screwball	Yes	Yes	No	No
flake	Yes	No	Yes	No

As nouns, flake is a hypernym of screwball; that is, flake is a word with a broader meaning than screwball:

Other hypernyms of screwball include eccentric, eccentric person, geek, oddball.

screwball (noun)	flake (noun)
a pitch with reverse spin that curves toward the side of the plate from which it was thrown	a small fragment of something broken off from the whole
a whimsically eccentric person	a person with an unusual or odd personality
	a crystal of snow

screwball (adjective)	flake (adjective)
foolish; totally unsound

screwball (verb)	flake (verb)
	come off in flakes or thin small pieces
	cover with flakes or as if with flakes
	form into flakes