Breadcrumb Home > Thesaurus > P Synonyms of pentanoic acid Find synonyms for: Noun1. valeric acid, pentanoic acid, carboxylic acidusage: a clear liquid carboxylic acid used in perfumes and drugsWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. ✖ Related Content Daily Word Quiz: legerdemain Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language