highbrow vs colloquialism

highbrow and colloquialism both are nouns.

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

highbrow (noun)	colloquialism (noun)
a person of intellectual or erudite tastes	a colloquial expression; characteristic of spoken or written communication that seeks to imitate informal speech

highbrow (adjective)	colloquialism (adjective)
highly cultured or educated