Breadcrumb Home > Thesaurus > F Synonyms of fissile Find synonyms for: Adjective 1. fissionable (vs. nonfissionable), fissile usage: capable of undergoing nuclear fission; "a fissionable nucleous"; "fissionable material" 2. fissile (vs. nonfissile) usage: capable of being split or cleft or divided in the direction of the grain; "fissile crystals"; "fissile wood" WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of fissile (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: outr Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language