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. Chinese New Year History, Meaning, and Celebrations Current Events This Week: February 2024 Valentine's Day Valentine's Day History Mardi Gras 30 "Charlie and the Chocolate Factory" Quotes ✖ Related Content Daily Word Quiz: variegate Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language