/ Thesaurus / M Synonyms of methacrylic acid Find synonyms for: Noun1. methacrylic acid, 2-methylpropenoic acid, acidusage: an unsaturated acid (C4H6O2) used to make resins and plasticsWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: abominable Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language