colloquialism vs cockamamie

colloquialism is a noun but cockamamie is not a noun.

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

colloquialism (noun)	cockamamie (noun)
a colloquial expression; characteristic of spoken or written communication that seeks to imitate informal speech

colloquialism (adjective)	cockamamie (adjective)
	informal term for ridiculous and implausible