case-hardened Synonyms

hard-boiled hardened lacking sentiment vitrified unfeeling uncharitable toughened tough thick-skinned stubborn stony steeled soulless unsusceptible armour-plated calloused insensitive to insults as tough as old boots as hard as nails unsympathetic uncaring inhumane hardhearted hard-bitten hard as nails compassionless seasoned pachydermatous impenitent heartless hard-hearted hard-headed hard fossilized cold-blooded callous calcified bullheaded armor-plated impervious incrusted orientated obstinate obdurate invulnerable inured insensitive insensible insensate inflexible