polar vs Arctic

polar is not a noun while Arctic is a noun.

Word	Noun	Adjective	Verb	Adverb
polar	No	Yes	No	No
Arctic	Yes	Yes	No	No

polar (noun)	Arctic (noun)
	the regions to the north of the Arctic Circle centered on the North Pole

polar (adjective)	Arctic (adjective)
of or existing at or near a geographical pole or within the Arctic or Antarctic Circles	of or relating to the Arctic
located at or near or coming from the earth's poles
having a pair of equal and opposite charges
extremely cold
being of crucial importance
characterized by opposite extremes; completely opposed