The term 'spine' is used to refer to the bony structure of the human body that runs from the neck to the lower BACK. It is composed of several components, including VERTEBRAE (9 letters), which are the individual bones that make up the spine; RIDGE (5 letters), which is the curved shape of the spine; BACK (4 letters), which is the area of the spine located between the shoulder blades; BACKBONE (8 letters), which is another name for the spine; THORN (5 letters), which is a sharp projection on the VERTEBRAE; VERTEBRA (8 letters), which is an individual bone in the spine; and vertebral column (15 letters), which is the medical term for the spine.