colloquialism vs cockamamy

colloquialism is a noun but cockamamy is not a noun.

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

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

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