cervical vertebra vs vertebra

cervical vertebra and vertebra both are nouns.

Word	Noun	Adjective	Verb	Adverb
cervical vertebra	Yes	No	No	No
vertebra	Yes	No	No	No

As nouns, vertebra is a hypernym of cervical vertebra; that is, vertebra is a word with a broader meaning than cervical vertebra:

cervical vertebra: one of 7 vertebrae in the human spine located in the neck region
vertebra: one of the bony segments of the spinal column

cervical vertebra (noun)	vertebra (noun)
one of 7 vertebrae in the human spine located in the neck region	one of the bony segments of the spinal column