colloquialism vs ringer

colloquialism and ringer both are nouns.

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

colloquialism (noun)	ringer (noun)
a colloquial expression; characteristic of spoken or written communication that seeks to imitate informal speech	(horseshoes) the successful throw of a horseshoe or quoit so as to encircle a stake or peg
	a contestant entered in a competition under false pretenses
	a person who is almost identical to another
	a person who rings church bells (as for summoning the congregation)