/ Thesaurus / G Synonyms of gas tight Find synonyms for: Adjective1. airtight, air-tight, gas-tight, tight (vs. leaky)usage: not allowing air or gas to pass in or outWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: inutiae Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language