Breadcrumb Home > Thesaurus > R Synonyms of river Find synonyms for: Noun1. river, stream, watercourseusage: a large natural stream of water (larger than a creek); "the river was navigable for 50 miles"WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of river (Dictionary) ✖ Related Content Daily Word Quiz: tautology Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language