Breadcrumb Home > Thesaurus > P Synonyms of pesticide Find synonyms for: Noun1. pesticide, chemical, chemical substanceusage: a chemical used to kill pests (as rodents or insects)WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of pesticide (Dictionary) ✖ Related Content Daily Word Quiz: legerdemain Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language