Heel is the back part of the foot, and it has various synonyms depending on the context. Some common synonyms include the sole, the underside of the foot, the foot's back, the hindfoot, the calcaneus, and the rearfoot. In some instances, it may be referred to as the back or rear of a particular object like a shoe, sock, or animal's paw. Heel may also be used metaphorically to depict a subordinate or someone who follows orders from someone else, and in this context, some synonyms may include subordinate, henchman, follower, or underling. The appropriate synonym for heel largely depends on the specific context in which it is used.