Breadcrumb Home > Thesaurus > N Synonyms of nembutal Find synonyms for: Noun 1. pentobarbital sodium, pentobarbital, Nembutal, yellow jacket, barbiturate usage: a barbiturate (trade name Nembutal) used as a sedative and hypnotic and antispasmodic WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of nembutal (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: deleterious Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language