rattrap vs colloquialism

rattrap and colloquialism both are nouns.

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

rattrap (noun)	colloquialism (noun)
a trap for catching rats	a colloquial expression; characteristic of spoken or written communication that seeks to imitate informal speech
filthy run-down dilapidated housing
a difficult entangling situation