river vs Ergun He

river and Ergun He both are nouns.

Word	Noun	Adjective	Verb	Adverb
river	Yes	No	No	No
Ergun He	Yes	No	No	No

river (noun)	Ergun He (noun)
a large natural stream of water (larger than a creek)	a river in eastern Asia that arises in China and flows northeast along the border between China and Russia to become a tributary of the Amur River