frontal lobe vs cortex

frontal lobe and cortex both are nouns.

Word	Noun	Adjective	Verb	Adverb
frontal lobe	Yes	No	No	No
cortex	Yes	No	No	No

frontal lobe (noun)	cortex (noun)
that part of the cerebral cortex in either hemisphere of the brain lying directly behind the forehead	the tissue forming the outer layer of an organ or structure in plant or animal
	the layer of unmyelinated neurons (the grey matter) forming the cortex of the cerebrum
	the tissue that surrounds the lens nucleus