concentricity vs disk shape

concentricity and disk shape both are nouns.

Word	Noun	Adjective	Verb	Adverb
concentricity	Yes	No	No	No
disk shape	Yes	No	No	No

As nouns, disk shape is a hypernym of concentricity; that is, disk shape is a word with a broader meaning than concentricity:

concentricity: the quality of having the same center (as circles inside one another)
disk shape: the roundness of a 2-dimensional figure

Other hypernyms of concentricity include circularity.

concentricity (noun)	disk shape (noun)
the quality of having the same center (as circles inside one another)	the roundness of a 2-dimensional figure