/ Thesaurus / S Synonyms of sildenafil Find synonyms for: Noun1. sildenafil, sildenafil citrate, Viagra, virility drug, anti-impotence drugusage: virility drug (trade name Viagra) used to treat erectile dysfunction in menWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: acerbity Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language