/ Thesaurus / C Synonyms of carboxylic Find synonyms for: Adjective1. carboxyl, carboxylicusage: relating to or containing the carboxyl group or carboxyl radicalWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: foliage Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language