fissiparity vs divisibility

fissiparity and divisibility both are nouns.

Word	Noun	Adjective	Verb	Adverb
fissiparity	Yes	No	No	No
divisibility	Yes	No	No	No

As nouns, divisibility is a hypernym of fissiparity; that is, divisibility is a word with a broader meaning than fissiparity:

fissiparity: the tendency to break into parts
divisibility: the quality of being divisible; the capacity to be divided into parts or divided among a number of persons

fissiparity (noun)	divisibility (noun)
the tendency to break into parts	the quality of being divisible; the capacity to be divided into parts or divided among a number of persons
reproduction of some multicellular organisms by division, as in the case of some starfish