eccentricity vs disk shape

eccentricity and disk shape both are nouns.

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

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

eccentricity: a circularity that has a different center or deviates from a circular path
disk shape: the roundness of a 2-dimensional figure

Other hypernyms of eccentricity include circularity.

eccentricity (noun)	disk shape (noun)
strange and unconventional behavior	the roundness of a 2-dimensional figure
a circularity that has a different center or deviates from a circular path
(geometry) a ratio describing the shape of a conic section; the ratio of the distance between the foci to the length of the major axis