European Union vs Holland

European Union and Holland both are nouns.

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

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