Yenisey River vs river

Yenisey River and river both are nouns.

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

Yenisey River (noun)	river (noun)
a Russian river in Siberia; rises in mountains near the Mongolian border and flows generally northward into the Kara Sea	a large natural stream of water (larger than a creek)