/ Thesaurus / C Synonyms of combustible material Find synonyms for: Noun1. combustible, combustible material, fuelusage: a substance that can be burned to provide heat or powerWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: laudable Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language