atlas vs cervical vertebra

atlas and cervical vertebra both are nouns.

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

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

atlas: the 1st cervical vertebra
cervical vertebra: one of 7 vertebrae in the human spine located in the neck region

Other hypernyms of atlas include neck bone.

atlas (noun)	cervical vertebra (noun)
a figure of a man used as a supporting column	one of 7 vertebrae in the human spine located in the neck region
the 1st cervical vertebra
a collection of maps in book form