/ Thesaurus / S Synonyms of slave market Find synonyms for: Noun1. slave market, marketplace, market place, mart, marketusage: a marketplace where slaves were auctioned off (especially in the southern United States before the American Civil War)WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: laudable Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language