/ Thesaurus / O Synonyms of order rheiformes Find synonyms for: Noun1. Rheiformes, order Rheiformes, animal orderusage: a ratite bird order: birds intermediate in characteristics between ostriches and emus: recent and extinct rheasWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: profiterole Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language