/ Thesaurus / U Synonyms of upper tunguska Find synonyms for: Noun1. Angara, Angara River, Tunguska, Upper Tunguskausage: a river in southeastern Siberia that flows northwest from Lake Baikal to become a tributary of the Yenisei RiverWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: polyglot Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language