Changjiang vs river

Changjiang and river both are nouns.

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

Changjiang (noun)	river (noun)
the longest river of Asia; flows eastward from Tibet into the East China Sea near Shanghai	a large natural stream of water (larger than a creek)