Philistinism, armor, benign tumor, callosity, callousness, cancer, carcinoma, corn, cyst, excrescence, flintiness, formidable defenses, fungosity, fungus, growth, hard heart, hard shell, hardenedness, hardheartedness, hardness, hardness of heart, heart of stone, imperviousness, induration, insensitiveness, insensitivity, intumescence, inuredness, malignant growth, metastatic tumor, mole, morbid growth, neoplasm, nevus, nonmalignant tumor, obduracy, obdurateness, outgrowth, proud flesh, rhinoceros hide, sarcoma, stoniness, thick skin, tumor, verruca, wart, wen