cortex vs lens

cortex and lens both are nouns.

Word	Noun	Adjective	Verb	Adverb
cortex	Yes	No	No	No
lens	Yes	No	No	No

cortex (noun)	lens (noun)
the tissue forming the outer layer of an organ or structure in plant or animal	a transparent optical device used to converge or diverge transmitted light and to form images
the layer of unmyelinated neurons (the grey matter) forming the cortex of the cerebrum	electronic equipment that uses a magnetic or electric field in order to focus a beam of electrons
the tissue that surrounds the lens nucleus	biconvex transparent body situated behind the iris in the eye; its role (along with the cornea) is to focus light on the retina
	(metaphor) a channel through which something can be seen or understood