There are several synonyms that can be used to refer to the phrase "rattling bones." One common term is "clattering bones," which conveys a similar sound and movement. Other related terms include "jarring bones," "noisy bones," and "rattling joints." Each of these phrases describes the sound and sensation of bones moving, often with a sense of discomfort or unease. Depending on the context, other synonyms such as "skeletal rattle" or "bony percussion" could also be used. Whether describing an eerie Halloween decoration or the real-life sensations of arthritis or aging, these synonyms help to paint a vivid picture of rattling bones.