Breadcrumb Home > Thesaurus > T Synonyms of toxicant Find synonyms for: Noun 1. poison, toxicant, poisonous substance, substance usage: any substance that causes injury or illness or death of a living organism Adjective 1. poisonous, toxicant, toxic (vs. nontoxic) usage: having the qualities or effects of a poison WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of toxicant (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: demagogue Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language