Angara vs Angara River

Angara and Angara River both are nouns.

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

As nouns, Angara and Angara River are synonyms defined as:

Angara and Angara River: a river in southeastern Siberia that flows northwest from Lake Baikal to become a tributary of the Yenisei River

Other synonyms of Angara include Tunguska, Upper Tunguska.

Angara (noun)	Angara River (noun)
a river in southeastern Siberia that flows northwest from Lake Baikal to become a tributary of the Yenisei River	a river in southeastern Siberia that flows northwest from Lake Baikal to become a tributary of the Yenisei River