flexibility vs plasticity

flexibility and plasticity both are nouns.

Word	Noun	Adjective	Verb	Adverb
flexibility	Yes	No	No	No
plasticity	Yes	No	No	No

As nouns, plasticity is a hypernym of flexibility; that is, plasticity is a word with a broader meaning than flexibility:

flexibility: the property of being flexible; easily bent or shaped
plasticity: the property of being physically malleable; the property of something that can be worked or hammered or shaped without breaking

Other hypernyms of flexibility include malleability.

flexibility (noun)	plasticity (noun)
the quality of being adaptable or variable	the property of being physically malleable; the property of something that can be worked or hammered or shaped without breaking
the property of being flexible; easily bent or shaped
the trait of being easily persuaded