/ Thesaurus / R Synonyms of ritonavir Find synonyms for: Noun1. ritonavir, Norvir, protease inhibitor, PIusage: a protease inhibitor (trade name Norvir) used in treating HIVWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: beseech Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language