The best replacement for spinal cord is spinal column.

The best alternatives to spinal cord are rated as following:
★★★★★  spinal column
★★★★  brain stem
★★  spinal chord
★★  spinal nerve
★★  vertebral column
★★  brain
★★  bone marrow
★★  notochord
★  nerve cord
★  spinal canal
★  column

Your alternative for spinal cord is not listed? Suggest!
Speaking about spinal cord, one probably shouldn't forget about vertebrae.

Other search terms related to spinal cord and their ratings are:
★★★★★ vertebrae
★ vertebral column
You have in mind a companion for spinal cord and it is not yet here? Propose!



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spinal cord
spinal column
brain stem