Spinal marrow and Spinal cord

Spinal cord and spinal marrow are semantically related. In some cases you can use "Spinal cord" instead a noun "Spinal marrow".

Spinal cord noun - A major part of the central nervous system which conducts sensory and motor nerve impulses to and from the brain; a long tubelike structure extending from the base of the brain through the vertebral canal to the upper lumbar region.

Spinal marrow and spinal cord are semantically related. You can use "Spinal marrow" instead a noun phrase "Spinal cord".