Synonyms of case-hardened

1 Syllable
hard, stiff, tough, cold
2 Syllables
soulless, stony, stubborn, torpid, callous, heartless
3 Syllables
hardened, thick-skinned, hardhearted, toughened, unfeeling, uncaring, inured, spiritless, careless, cold-blooded, hard-boiled, unbending, insentient, hard-bitten
4 Syllables
obdurate, unaffected, insensate, impassive, insensible, indifferent, apathetic, indurated, inflexible, unconcerned, impenitent
5 Syllables
unresponsive, unsusceptible, unsympathetic, insensitive, casehardened
6 Syllables
uncompassionate, unimpressionable