colloquialism vs sure-enough

colloquialism is a noun but sure-enough is not a noun.

Word	Noun	Adjective	Verb	Adverb
colloquialism	Yes	No	No	No
sure-enough	No	Yes	No	No

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

colloquialism (adjective)	sure-enough (adjective)
	(used informally especially for emphasis) real or genuine