/ Thesaurus / P Synonyms of permanganic acid Find synonyms for: Noun1. permanganic acid, acidusage: an unstable purple acid (HMnO4) known only in solution or of permanganate saltsWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: candor Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language