gyrus vs central gyrus

gyrus and central gyrus both are nouns.

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

As nouns, central gyrus is a hyponym of gyrus; that is, central gyrus is a word with a more specific, narrower meaning than gyrus:

Other hyponyms of gyrus include frontal gyrus, temporal gyrus, parietal gyrus, occipital gyrus.

gyrus (noun)	central gyrus (noun)
a convex fold or elevation in the surface of the brain	either of two gyri on either side of the central sulcus