/ Thesaurus / O Synonyms of ofo Find synonyms for: Noun1. Ofo, Sioux, Siouanusage: a member of the Siouan people living in the Yazoo river valley in Mississippi2. Ofo, Siouan, Siouan languageusage: a Siouan language spoken by the OfoWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: lyceum Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language