bounciness vs elasticity

bounciness and elasticity both are nouns.

Word	Noun	Adjective	Verb	Adverb
bounciness	Yes	No	No	No
elasticity	Yes	No	No	No

As nouns, elasticity is a hypernym of bounciness; that is, elasticity is a word with a broader meaning than bounciness:

bounciness: the quality of a substance that is able to rebound
elasticity: the tendency of a body to return to its original shape after it has been stretched or compressed

Other hypernyms of bounciness include snap.

bounciness (noun)	elasticity (noun)
the quality of a substance that is able to rebound	the tendency of a body to return to its original shape after it has been stretched or compressed