Amur River vs Heilong Jiang

Amur River and Heilong Jiang both are nouns.

Word	Noun	Adjective	Verb	Adverb
Amur River	Yes	No	No	No
Heilong Jiang	Yes	No	No	No

As nouns, Amur River and Heilong Jiang are synonyms defined as:

Amur River and Heilong Jiang: an Asian river between China and Russia; flows into the Sea of Okhotsk

Other synonyms of Amur River include Amur, Heilong.

Amur River (noun)	Heilong Jiang (noun)
an Asian river between China and Russia; flows into the Sea of Okhotsk	an Asian river between China and Russia; flows into the Sea of Okhotsk