colloquialism vs prehistoric

colloquialism is a noun but prehistoric is not a noun.

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

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

colloquialism (adjective)	prehistoric (adjective)
	of or relating to times before written history
	belonging to or existing in times before recorded history
	outdated