Breadcrumb Home > Thesaurus > F Synonyms of fission Find synonyms for: Noun 1. fission, asexual reproduction, agamogenesis usage: reproduction of some unicellular organisms by division of the cell into two more or less equal parts 2. fission, nuclear fission, nuclear reaction usage: a nuclear reaction in which a massive nucleus splits into smaller nuclei with the simultaneous release of energy WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of fission (Dictionary) TrendingHere are the facts and trivia that people are buzzing about. The Book of Philippians: Summary Current Events This Week: May 2023 Preamble of the United Nations Charter Queen Victoria Books of the Bible: New Testament Books in Order The 88 Recognized Constellations ✖ Related Content Daily Word Quiz: shanghai Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language