colloquialism vs geezer

colloquialism and geezer both are nouns.

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

colloquialism (noun)	geezer (noun)
a colloquial expression; characteristic of spoken or written communication that seeks to imitate informal speech	a man who is (usually) old and/or eccentric