/ Thesaurus / G Synonyms of greenhouse gas Find synonyms for: Noun1. greenhouse gas, greenhouse emission, gasusage: a gas that contributes to the greenhouse effect by absorbing infrared radiationWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: apogee Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language