river vs Volkhov River

river and Volkhov River both are nouns.

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

river (noun)	Volkhov River (noun)
a large natural stream of water (larger than a creek)	a river in northwestern Russia flowing generally north into Lake Ladoga