intervertebral disk vs spinal column

intervertebral disk and spinal column both are nouns.

Word	Noun	Adjective	Verb	Adverb
intervertebral disk	Yes	No	No	No
spinal column	Yes	No	No	No

intervertebral disk (noun)	spinal column (noun)
a fibrocartilaginous disc serving as a cushion between all of the vertebrae of the spinal column (except between the first two)	the series of vertebrae forming the axis of the skeleton and protecting the spinal cord