concentricity vs circularity

concentricity and circularity both are nouns.

Word	Noun	Adjective	Verb	Adverb
concentricity	Yes	No	No	No
circularity	Yes	No	No	No

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

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

Other hypernyms of concentricity include disk shape.

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