/ Thesaurus / T Synonyms of trinity river Find synonyms for: Noun1. Trinity Riverusage: a river in eastern Texas that is formed near Dallas and flows generally southeastward to Galveston BayWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: quandary Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language