There are many antonyms for the term "bony callus" which refers to the formation of hard tissue in response to a bone fracture. Many of these antonyms relate to the softness, flexibility, and pliability of healthy bones. Antonyms for "bony callus" include: cartilaginous, pliable, flexible, resilient, healthy, undamaged, and malleable. These words imply a bone that is strong, yet flexible enough to withstand impact without breaking. Unlike a bone that has formed a bony callus, bones that are pliable, resilient, and healthy are less prone to fractures, and can move with ease without causing pain or strain on the surrounding ligaments and tendons.