frontal gyrus vs convolution

frontal gyrus and convolution both are nouns.

Word	Noun	Adjective	Verb	Adverb
frontal gyrus	Yes	No	No	No
convolution	Yes	No	No	No

As nouns, convolution is a hypernym of frontal gyrus; that is, convolution is a word with a broader meaning than frontal gyrus:

frontal gyrus: any of the convolutions of the outer surface of the frontal lobe of the cerebrum
convolution: a convex fold or elevation in the surface of the brain

Other hypernyms of frontal gyrus include gyrus.

frontal gyrus (noun)	convolution (noun)
any of the convolutions of the outer surface of the frontal lobe of the cerebrum	the action of coiling or twisting or winding together
	a convex fold or elevation in the surface of the brain
	the shape of something rotating rapidly