/ Thesaurus / S Synonyms of slave state Find synonyms for: Noun1. slave state, American stateusage: any of the southern states in which slavery was legal prior to the American Civil WarWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: loathe Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language