/ Thesaurus / V Synonyms of vaccinum Find synonyms for: Noun1. vaccine, vaccinum, immunogen, immunizing agentusage: immunogen consisting of a suspension of weakened or dead pathogenic cells injected in order to stimulate the production of antibodiesWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: panacea Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language