/ Thesaurus / B Synonyms of biological weapon Find synonyms for: Noun1. bioweapon, biological weapon, bioarm, weapon of mass destruction, WMD, W.M.D.usage: any weapon usable in biological warfare; "they feared use of the smallpox virus as a bioweapon"WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: devout Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language