The pelvic bone is a complex structure made up of several bones, including the ILIUM (5 letters), sacrum (6 letters), iliac (4 letters), pubis (5 letters), HIP (3 letters), and ischium (7 letters). The ILIUM is the largest of the pelvic bones and forms the sides and upper part of the pelvis. The sacrum is a triangular bone at the base of the spine that connects the ILIUM to the coccyx. The iliac bones are two curved bones that form the sides of the pelvis. The pubis is a fan-shaped bone located in front of the ILIUM and sacrum. The HIP is a ball-and-socket joint formed by the head of the femur and the acetabulum of the ILIUM. The ischium is a large, curved bone located at the bottom of the pelvis. Together, these bones form the pelvic girdle, which provides support for the lower body and protects the organs within the pelvic cavity.