Synonyms to thick skinned

Philistine, asleep, benumbed, callous, calloused, case-hardened, dead, deadened, dull, flinty, hard, hardened, hardhearted, impassible, imperceptive, impercipient, impervious, indurated, insensate, insensible, insensitive, insentient, inured, numb, numbed, obdurate, obtuse, pachydermatous, proof against, steeled against, steely, stony, thick-witted, unfeeling, unfelt, unperceptive