Breadcrumb Home > Thesaurus > I Synonyms of ion Find synonyms for: Noun 1. ion, particle, subatomic particle usage: a particle that is electrically charged (positive or negative); an atom or molecule or group that has lost or gained one or more electrons WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of ion (Dictionary) TrendingHere are the facts and trivia that people are buzzing about. Hanukkah Origins of the Christmas Holiday Jewish Holidays, 2010-2030 (A.M. 5770-5791) Western Christian Holidays, 2010-2030 Krampus: The Christmas Devil Kwanzaa ✖ Related Content Daily Word Quiz: jactation Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language