countenance vs colloquialism

countenance and colloquialism both are nouns.

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

countenance (noun)	colloquialism (noun)
the appearance conveyed by a person's face	a colloquial expression; characteristic of spoken or written communication that seeks to imitate informal speech
the human face (`kisser' and `smiler' and `mug' are informal terms for `face' and `phiz' is British)
formal and explicit approval

countenance (verb)	colloquialism (verb)
consent to, give permission; permit