/ Thesaurus / P Synonyms of penicillin g Find synonyms for: Noun1. penicillin G, benzylpenicillin, penicillinusage: the penicillin that constitutes the principal component of many commercial antibioticsWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: pristine Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language