Tailbone, also known as coccyx, is the small triangular bone at the end of the spinal column. It is an essential bone structure that supports the weight of our body, absorbs shocks, and allows us to sit comfortably. However, there are few synonyms for tailbone that can be used in different situations. Some of them include coccygeal bone, coccyx bone, sacrum bone, and vertebral column. Though these words refer to the same bone structure, they can be used interchangeably depending on the context. It's important to note that tailbone injuries can be painful and take time to heal. So, taking care of this delicate bone structure is imperative for healthy movement and posture.