/ Thesaurus / N Synonyms of nebcin Find synonyms for: Noun1. tobramycin, Nebcin, antibiotic, antibiotic drugusage: an antibiotic (trade name Nebcin) that is especially effective against Gram-negative bacteriaWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: agitated Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language