Belgium vs Meuse River

Belgium and Meuse River both are nouns.

Word	Noun	Adjective	Verb	Adverb
Belgium	Yes	No	No	No
Meuse River	Yes	No	No	No

Belgium (noun)	Meuse River (noun)
a monarchy in northwestern Europe; headquarters for the European Union and for the North Atlantic Treaty Organization	an American operation in World War I (1918); American troops under Pershing drove back the German armies which were saved only by the armistice on November 11
	a European river; flows into the North Sea