/ Thesaurus / S Synonyms of sleeping pill Find synonyms for: Noun1. sleeping pill, sleeping tablet, sleeping capsule, sleeping draught, soporific, hypnotic, pill, lozenge, tablet, tabusage: a soporific drug in the form of a pill (or tablet or capsule)WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: nefarious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language