barbarian vs barbaric

barbarian is a noun but barbaric is not a noun.

Word	Noun	Adjective	Verb	Adverb
barbarian	Yes	Yes	No	No
barbaric	No	Yes	No	No

As adjectives, barbarian and barbaric are synonyms defined as:

Other synonyms of barbarian include savage, uncivilised, uncivilized, wild.

barbarian (noun)	barbaric (noun)
a member of an uncivilized people
a crude uncouth ill-bred person lacking culture or refinement

barbarian (adjective)	barbaric (adjective)
without civilizing influences	without civilizing influences
	unrestrained and crudely rich