fogy vs colloquialism

fogy and colloquialism both are nouns.

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

fogy (noun)	colloquialism (noun)
someone whose style is out of fashion	a colloquial expression; characteristic of spoken or written communication that seeks to imitate informal speech