Breadcrumb Home > Thesaurus > M Synonyms of molecule Find synonyms for: Noun 1. molecule, unit, building block usage: (physics and chemistry) the simplest structural unit of an element or compound 2. atom, molecule, particle, corpuscle, mote, speck, material, stuff usage: (nontechnical usage) a tiny piece of anything WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of molecule (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: antiphon Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language