case-hardened Synonyms

hard-boiled hardened lacking sentiment unsusceptible vitrified unfeeling uncharitable toughened tough thick-skinned stubborn stony steeled 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 soulless seasoned heartless hard-hearted hard-headed hard fossilized cold-blooded callous calcified bullheaded armor-plated impenitent impervious indurate pachydermatous obstinate obdurate invulnerable inured insensitive insensible insensate inflexible indurated