colloquialism vs Johnny

colloquialism and Johnny both are nouns.

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

colloquialism (noun)	Johnny (noun)
a colloquial expression; characteristic of spoken or written communication that seeks to imitate informal speech	`Johnny' was applied as a nickname for Confederate soldiers by the Federal soldiers in the American Civil War; `greyback' derived from their grey Confederate uniforms