Amur vs Heilong

Amur and Heilong both are nouns.

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

As nouns, Amur and Heilong are synonyms defined as:

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

Other synonyms of Amur include Amur River, Heilong Jiang.

Amur (noun)	Heilong (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