geezer vs colloquialism

geezer and colloquialism both are nouns.

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

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