Breadcrumb Home > Thesaurus > P Synonyms of plasticizer Find synonyms for: Noun1. plasticizer, plasticiser, softenerusage: a substance added to plastics or other materials to make them more pliableWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of plasticizer (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