List of stiffened synonyms and stiffened related words.
accelerated, aggrandized, amplified, augmented, backed, beefed-up, bloated, boosted, broadened, calcified, callous, calloused, case-hardened, crusted, crusty, crystallized, deepened, elevated, enhanced, enlarged, expanded, extended, fossilized, granulated, hardened, heightened, hiked, hornified, increased, incrusted, indurate, indurated, inflated, intensified, jazzed up, lapidified, magnified, multiplied, ossified, petrified, proliferated, raised, reinforced, rigidified, sclerotic, set, solidified, spread, steeled, strengthened, swollen, tightened, toughened, vitrified, widened