/ Thesaurus / U Synonyms of upper avon Find synonyms for: Noun1. Avon, River Avon, Upper Avon, Upper Avon Riverusage: a river in central England that flows through Stratford-on-Avon and empties into the SevernWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: acquiesce Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language