river vs Stony Tunguska

river and Stony Tunguska both are nouns.

Word	Noun	Adjective	Verb	Adverb
river	Yes	No	No	No
Stony Tunguska	Yes	No	No	No

river (noun)	Stony Tunguska (noun)
a large natural stream of water (larger than a creek)	a river in Siberia that flows northwest to become a tributary of the Yenisei River