frightful vs colloquialism

frightful is not a noun while colloquialism is a noun.

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

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

frightful (adjective)	colloquialism (adjective)
provoking horror
extremely distressing
extreme in degree or extent or amount or impact