The term 'BONES IN THE PELVIS' can be summarized by the four-letter word 'ILIA'. This term refers to the two bones that make up the pelvis, which are the ilium and the ischium. The ilium is the uppermost and largest bone of the pelvis, while the ischium is the lowermost and strongest bone. Together, these two bones form the bony structure of the pelvis, which provides support for the spine and helps to protect the internal organs.