river vs Hwang Ho

river and Hwang Ho both are nouns.

Word	Noun	Adjective	Verb	Adverb
river	Yes	No	No	No
Hwang Ho	Yes	No	No	No

river (noun)	Hwang Ho (noun)
a large natural stream of water (larger than a creek)	a major river of Asia in northern China; flows generally eastward into the Yellow Sea; carries large quantities of yellow silt to its delta