Breadcrumb Home > Thesaurus > P Synonyms of placebo Find synonyms for: Noun 1. placebo, medicine, medication, medicament, medicinal drug usage: an innocuous or inert medication; given as a pacifier or to the control group in experiments on the efficacy of a drug 2. placebo, vesper usage: (Roman Catholic Church) vespers of the office for the dead WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of placebo (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: spurious Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language