The term "dog hook" could be replaced with various synonyms, including "leash hook," "collar hook," "pet clip," or even "animal fastener." These synonyms describe an object that serves as a connection between a dog's leash, collar, or harness to a fixed surface like a wall or a fence. It is typically a metal hook that is sturdy and designed to withstand the weight and pull of a dog. Alternative terms for a "dog hook" could also include "lead clip," "belt hook," "tether hook," or "chain clip." In general, these synonyms are interchangeable when referring to a device that secures a dog to a designated area.