Yangtze River vs Chang Jiang

Yangtze River and Chang Jiang both are nouns.

Word	Noun	Adjective	Verb	Adverb
Yangtze River	Yes	No	No	No
Chang Jiang	Yes	No	No	No

As nouns, Yangtze River and Chang Jiang are synonyms defined as:

Yangtze River and Chang Jiang: the longest river of Asia; flows eastward from Tibet into the East China Sea near Shanghai

Other synonyms of Yangtze River include Chang, Changjiang, Yangtze, Yangtze Kiang.

Yangtze River (noun)	Chang Jiang (noun)
the longest river of Asia; flows eastward from Tibet into the East China Sea near Shanghai	the longest river of Asia; flows eastward from Tibet into the East China Sea near Shanghai