utilitarian vs functional

utilitarian is a noun but functional is not a noun.

Word	Noun	Adjective	Verb	Adverb
utilitarian	Yes	Yes	No	No
functional	No	Yes	No	No

utilitarian (noun)	functional (noun)
someone who believes that the value of a thing depends on its utility

utilitarian (adjective)	functional (adjective)
having a useful function	designed for or capable of a particular function or use
having utility often to the exclusion of values	involving or affecting function rather than physiology
	relating to or based on function especially as opposed to structure
	(of e.g. a machine) performing or capable of performing
	designed for or adapted to a function or use
	fit or ready for use or service