cheap vs colloquialism

cheap is not a noun while colloquialism is a noun.

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

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

cheap (adjective)	colloquialism (adjective)
relatively low in price or charging low prices
of very poor quality; flimsy
embarrassingly stingy
tastelessly showy