river vs Shenandoah River

river and Shenandoah River both are nouns.

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

river (noun)	Shenandoah River (noun)
a large natural stream of water (larger than a creek)	a river of northern Virginia that empties into the Potomac at Harpers Ferry