/ Thesaurus / E Synonyms of eastern sioux Find synonyms for: Noun1. Santee, Santee Sioux, Santee Dakota, Eastern Sioux, Sioux, Siouanusage: a member of the eastern branch of the SiouxWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: illegible Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language