neck bone vs atlas

neck bone and atlas both are nouns.

Word	Noun	Adjective	Verb	Adverb
neck bone	Yes	No	No	No
atlas	Yes	No	No	No

As nouns, atlas is a hyponym of neck bone; that is, atlas is a word with a more specific, narrower meaning than neck bone:

Other hyponyms of neck bone include atlas vertebra, axis, axis vertebra.

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