Italia vs Italian

Italia and Italian both are nouns.

Word	Noun	Adjective	Verb	Adverb
Italia	Yes	No	No	No
Italian	Yes	Yes	No	No

Italia (noun)	Italian (noun)
a republic in southern Europe on the Italian Peninsula; was the core of the Roman Republic and the Roman Empire between the 4th century BC and the 5th century AD	the Romance language spoken in Italy
	a native or inhabitant of Italy

Italia (adjective)	Italian (adjective)
	of or pertaining to or characteristic of Italy or its people or culture or language