/ Thesaurus / S Synonyms of sulphur hexafluoride Find synonyms for: Noun1. sulfur hexafluoride, sulphur hexafluoride, fluoride, greenhouse gas, greenhouse emissionusage: a colorless gas that is soluble in alcohol and ether; a powerful greenhouse gas widely used in the electrical utility industryWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: nefarious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language