/ Thesaurus / L Synonyms of lactic acid Find synonyms for: Noun1. lactic acid, carboxylic acidusage: a clear odorless hygroscopic syrupy carboxylic acid found in sour milk and in many fruitsWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: tenacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language