Common Market vs Belgium

Common Market and Belgium both are nouns.

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

Common Market (noun)	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