/ Thesaurus / G Synonyms of genus rhea Find synonyms for: Noun1. genus Rhea, bird genususage: type genus of the Rheidae; large tall flightless South American birds similar to but smaller than ostrichesWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: nefarious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language