Synonyms and related words :
Philistine, backed, brazen, calcified, callous, calloused, case-hardened, conscienceless, crusted, crusty, crystallized, flinty, fossilized, granulated, hard, hardened, hardhearted, heartless, hornified, impervious, incrusted, indurate, insensitive, inured, lapidified, lost to shame, obdurate, ossified, pachydermatous, petrified, proof against, reinforced, rigidified, sclerotic, seared, set, shameless, solidified, steeled, steeled against, steely, stiffened, stony, strengthened, thick-skinned, toughened, unblushing, vitrified