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. Hanukkah Origins of the Christmas Holiday Jewish Holidays, 2010-2030 (A.M. 5770-5791) Western Christian Holidays, 2010-2030 Krampus: The Christmas Devil Kwanzaa ✖ Related Content Daily Word Quiz: tintinnabulation Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language