neocortex vs cerebral cortex

neocortex and cerebral cortex both are nouns.

Word	Noun	Adjective	Verb	Adverb
neocortex	Yes	No	No	No
cerebral cortex	Yes	No	No	No

As nouns, cerebral cortex is a hypernym of neocortex; that is, cerebral cortex is a word with a broader meaning than neocortex:

neocortex: the cortical part of the neencephalon
cerebral cortex: the layer of unmyelinated neurons (the grey matter) forming the cortex of the cerebrum

Other hypernyms of neocortex include cerebral mantle, cortex, pallium.

neocortex (noun)	cerebral cortex (noun)
the cortical part of the neencephalon	the layer of unmyelinated neurons (the grey matter) forming the cortex of the cerebrum