/ Thesaurus / S Synonyms of sell out Find synonyms for: Noun1. sellout, treachery, betrayal, treason, perfidyusage: an act of betrayalVerb1. sell out, sell up, liquidize, discard, fling, toss, toss out, toss away, chuck out, cast aside, dispose, throw out, cast out, throw away, cast away, put awayusage: get rid of all one's merchandise2. sell out, denounce, tell on, betray, give away, rat, grass, shit, shop, snitch, stagusage: give information that compromises othersWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: endear Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language