dystopia vs dystopian

dystopia is a noun but dystopian is not a noun.

Word	Noun	Adjective	Verb	Adverb
dystopia	Yes	No	No	No
dystopian	No	Yes	No	No

dystopia (noun)	dystopian (noun)
a work of fiction describing an imaginary place where life is extremely bad because of deprivation or oppression or terror
state in which the conditions of life are extremely bad as from deprivation or oppression or terror

dystopia (adjective)	dystopian (adjective)
	as bad as can be; characterized by human misery
	of or pertaining to or resembling a dystopia