vertebral column vs intervertebral disc

vertebral column and intervertebral disc both are nouns.

Word	Noun	Adjective	Verb	Adverb
vertebral column	Yes	No	No	No
intervertebral disc	Yes	No	No	No

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