river vs Meuse River

river and Meuse River both are nouns.

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

river (noun)	Meuse River (noun)
a large natural stream of water (larger than a creek)	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