Heilong Jiang vs Amur River

Heilong Jiang and Amur River both are nouns.

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

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

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

Other synonyms of Heilong Jiang include Amur, Heilong.

Heilong Jiang (noun)	Amur River (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