/ Thesaurus / U Synonyms of underseller Find synonyms for: Noun1. underseller, seller, marketer, vender, vendor, traffickerusage: a seller that sells at a lower price than others do; "he went all over town looking for undersellers"WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: philanthropy Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language