colloquialism vs hellish

colloquialism is a noun but hellish is not a noun.

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

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

colloquialism (adjective)	hellish (adjective)
	extremely evil or cruel; expressive of cruelty or befitting hell
	(informal) very unpleasant