screwball vs colloquialism

screwball and colloquialism both are nouns.

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

screwball (noun)	colloquialism (noun)
a pitch with reverse spin that curves toward the side of the plate from which it was thrown	a colloquial expression; characteristic of spoken or written communication that seeks to imitate informal speech
a whimsically eccentric person

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