colloquialism vs screwy

colloquialism is a noun but screwy is not a noun.

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

colloquialism (noun)	screwy (noun)
a colloquial expression; characteristic of spoken or written communication that seeks to imitate informal speech

colloquialism (adjective)	screwy (adjective)
	not behaving normally