Synonyms and related words :
Philistine, brazen, callous, calloused, case-hardened, cold, cold of heart, coldblooded, coldhearted, conscienceless, flinthearted, flinty, hard, hard of heart, hard-boiled, hardened, heartless, impervious, indurated, insensitive, inured, lost to shame, obdurate, pachydermatous, proof against, seared, shameless, steeled against, steely, stony, stonyhearted, thick-skinned, unblushing, uncompassionate, unemotional, unfeeling, unmerciful, unnatural, unresponsive, unsympathetic