/ Thesaurus / E Synonyms of ergun he Find synonyms for: Noun1. Argun, Argun River, Ergun Heusage: a river in eastern Asia that arises in China and flows northeast along the border between China and Russia to become a tributary of the Amur RiverWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: effervescent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language