callus vs. callous, related but not the same. callus: A callus (or callosity) is an especially toughened area of skin which has become relatively thick and ha

callus vs. callous, related but not the same. callus: A callus (or callosity) is an especially toughened area of skin which has become relatively thick and hard as a response to repeated contact callous: emotionally hardened; "a callous indifference to suffering"; "cold-blooded and indurate to public opinion"