eccentricity vs unfamiliarity

eccentricity and unfamiliarity both are nouns.

Word	Noun	Adjective	Verb	Adverb
eccentricity	Yes	No	No	No
unfamiliarity	Yes	No	No	No

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

Other hypernyms of eccentricity include strangeness.

eccentricity (noun)	unfamiliarity (noun)
strange and unconventional behavior	unusualness as a consequence of not being well known
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