Adjustable rhymes with:
combustable, christabelle, combustable, constable, contestable, cristobal, digestible, harvestable, huxtable, inexhaustible, investable, irresistible, suggestible
combustable, christabelle, combustable, constable, contestable, cristobal, digestible, harvestable, huxtable, inexhaustible, investable, irresistible, suggestible