/ Thesaurus / P Synonyms of parnahiba Find synonyms for: Noun1. Parnaiba, Parnahibausage: a river in northeastern Brazil that flows generally northward to the Atlantic OceanWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: reticent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language