colloquialism vs dud

colloquialism and dud both are nouns.

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

colloquialism (noun)	dud (noun)
a colloquial expression; characteristic of spoken or written communication that seeks to imitate informal speech	an event that fails badly or is totally ineffectual
	an explosion that fails to occur
	someone who is unsuccessful

colloquialism (adjective)	dud (adjective)
	failing to detonate; especially not charged with an active explosive