Shenandoah River vs river

Shenandoah River and river both are nouns.

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

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