Breadcrumb Home > Thesaurus > O Synonyms of oppugn Find synonyms for: Verb 1. question, oppugn, call into question, challenge usage: challenge the accuracy, probity, or propriety of; "We must question your judgment in this matter" WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of oppugn (Dictionary) TrendingHere are the facts and trivia that people are buzzing about. Jewish Holidays, 2010-2030 (A.M. 5770-5791) Western Christian Holidays, 2010-2030 12 Steps to a New Year New Year's Resolution to Slim Down? Martin Luther King Speeches Books of the Bible: Old Testament Books in Order ✖ Related Content Daily Word Quiz: odaysuiz Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language