Breadcrumb Home > Thesaurus > N Synonyms of naltrexone Find synonyms for: Noun 1. naltrexone, narcotic antagonist usage: an oral antagonist against the action of opiates WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of naltrexone (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: neologism Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language