Common Market vs Kingdom of Belgium

Common Market and Kingdom of Belgium both are nouns.

Word	Noun	Adjective	Verb	Adverb
Common Market	Yes	No	No	No
Kingdom of Belgium	Yes	No	No	No

Common Market (noun)	Kingdom of Belgium (noun)
an international organization of European countries formed after World War II to reduce trade barriers and increase cooperation among its members	a monarchy in northwestern Europe; headquarters for the European Union and for the North Atlantic Treaty Organization