/ Thesaurus / T Synonyms of tocantins river Find synonyms for: Noun1. Tocantins, Tocantins Riverusage: a river in eastern Brazil that flows generally north to the Para RiverWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: opulent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language