/ Thesaurus / B Synonyms of bacilli Find synonyms for: Noun1. bacillus, B, eubacteria, eubacterium, true bacteriausage: aerobic rod-shaped spore-producing bacterium; often occurring in chainlike formations; found primarily in soilWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: labyrinth Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language