washout vs colloquialism

washout and colloquialism both are nouns.

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

washout (noun)	colloquialism (noun)
someone who is unsuccessful	a colloquial expression; characteristic of spoken or written communication that seeks to imitate informal speech
the erosive process of washing away soil or gravel by water (as from a roadway)
the channel or break produced by erosion of relatively soft soil by water