Italian Republic vs European Union

Italian Republic and European Union both are nouns.

Word	Noun	Adjective	Verb	Adverb
Italian Republic	Yes	No	No	No
European Union	Yes	No	No	No

Italian Republic (noun)	European Union (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	an international organization of European countries formed after World War II to reduce trade barriers and increase cooperation among its members