Italy vs Italia

Italy and Italia both are nouns.

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

As nouns, Italy and Italia are synonyms defined as:

Italy and Italia: 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

Other synonyms of Italy include Italian Republic.

Italy (noun)	Italia (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	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