colloquialism vs put-down

colloquialism and put-down both are nouns.

Word	Noun	Adjective	Verb	Adverb
colloquialism	Yes	No	No	No
put-down	Yes	No	No	No

colloquialism (noun)	put-down (noun)
a colloquial expression; characteristic of spoken or written communication that seeks to imitate informal speech	a crushing remark