The term "turning bone" can mean different things depending on the context. Generally, it refers to a bone that rotates or turns. However, there are other terms that can be used as synonyms for "turning bone." One of them is "rotary bone," which conveys the same meaning but is less commonly used. "Pivot bone" is another synonym that emphasizes the bone's function as a pivot point for movement. Other terms that could be used include "rotational bone," "spindle bone," and "swivel bone." These synonyms can be useful when discussing anatomy or movement functions in animals or humans.