river vs Angara

river and Angara both are nouns.

Word	Noun	Adjective	Verb	Adverb
river	Yes	No	No	No
Angara	Yes	No	No	No

river (noun)	Angara (noun)
a large natural stream of water (larger than a creek)	a river in southeastern Siberia that flows northwest from Lake Baikal to become a tributary of the Yenisei River