/ Thesaurus / I Synonyms of isobutylphenyl propionic acid Find synonyms for: Noun1. ibuprofen, isobutylphenyl propionic acid, Advil, Motrin, Nuprin, nonsteroidal anti-inflammatory, nonsteroidal anti-inflammatory drug, NSAIDusage: a nonsteroidal anti-inflammatory and analgesic medicine (trade names Advil and Motrin and Nuprin) used to relieve the pain of arthritis and as an antipyretic; "daily use of ibuprofen can irritate the stomach"WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: procrastinate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language