occipital gyrus vs gyrus

occipital gyrus and gyrus both are nouns.

Word	Noun	Adjective	Verb	Adverb
occipital gyrus	Yes	No	No	No
gyrus	Yes	No	No	No

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

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

Other hypernyms of occipital gyrus include convolution.

occipital gyrus (noun)	gyrus (noun)
any of the convolutions of the outer surface of the occipital lobe of the cerebrum	a convex fold or elevation in the surface of the brain