colloquialism vs mopes

colloquialism and mopes both are nouns.

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

colloquialism (noun)	mopes (noun)
a colloquial expression; characteristic of spoken or written communication that seeks to imitate informal speech	an informal expression for a mildly depressed state