borsht belt vs colloquialism

borsht belt and colloquialism both are nouns.

Word	Noun	Adjective	Verb	Adverb
borsht belt	Yes	No	No	No
colloquialism	Yes	No	No	No

borsht belt (noun)	colloquialism (noun)
(informal) a resort area in the Catskill Mountains of New York that was patronized primarily by Jewish guests	a colloquial expression; characteristic of spoken or written communication that seeks to imitate informal speech