Holland vs European Union

Holland and European Union both are nouns.

Word	Noun	Adjective	Verb	Adverb
Holland	Yes	No	No	No
European Union	Yes	No	No	No

Holland (noun)	European Union (noun)
a constitutional monarchy in western Europe on the North Sea; half the country lies below sea level	an international organization of European countries formed after World War II to reduce trade barriers and increase cooperation among its members