river vs Kan River

river and Kan River both are nouns.

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

river (noun)	Kan River (noun)
a large natural stream of water (larger than a creek)	a river in southeastern China that flows generally north into the Chang Jiang to the north of Nanchang