Another word for callous

Completely lacking in compassion:
cold-blooded, cold-hearted, compassionless, hard, hard-boiled, hardened, hardhearted, heartless, obdurate, stonyhearted, unfeeling. See attitude
Another word for callous

callous
Synonyms
callous
modif.
unfeeling, insensitive, inured, hardened, unsusceptible, uncaring, unaffected by, hard, insensible, stubborn, stiff, unbending, indurated, obdurate, insentient, insensate, inflexible, cold, coldhearted, hardhearted, unresponsive, unconcerned, impassive, apathetic, heartless, coldblooded, impenitent, unsympathetic, soulless, spiritless, toughened, blind to, deaf to, unimpressionable, tough*, hard-boiled*, thick-skinned*, case-hardened*, hard as nails*; see also cruel 2, indifferent 1.
Antonyms concerned, compassionate, sensitive.