Breadcrumb Home > Thesaurus > B Synonyms of barbiturate Find synonyms for: Noun 1. barbiturate, sedative-hypnotic, sedative-hypnotic drug usage: organic compound having powerful soporific effect; overdose can be fatal WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of barbiturate (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: inmediasres Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language