Combustable rhymes with:
adjustable, adjustable, christabelle, constable, contestable, cristobal, digestible, harvestable, huxtable, inexhaustible, investable, irresistible, suggestible
adjustable, adjustable, christabelle, constable, contestable, cristobal, digestible, harvestable, huxtable, inexhaustible, investable, irresistible, suggestible