/ Thesaurus / M Synonyms of methyl bromide Find synonyms for: Noun1. methyl bromide, bromideusage: a poisonous gas or liquid (CH3Br) used to fumigate rodents, worms, etc.WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: penurious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language