paleocortex vs cerebral cortex

paleocortex and cerebral cortex both are nouns.

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

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

paleocortex: the olfactory cortex of the cerebrum
cerebral cortex: the layer of unmyelinated neurons (the grey matter) forming the cortex of the cerebrum

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

paleocortex (noun)	cerebral cortex (noun)
the olfactory cortex of the cerebrum	the layer of unmyelinated neurons (the grey matter) forming the cortex of the cerebrum