bendability vs flexibleness

bendability and flexibleness both are nouns.

Word	Noun	Adjective	Verb	Adverb
bendability	Yes	No	No	No
flexibleness	Yes	No	No	No

As nouns, flexibleness is a hypernym of bendability; that is, flexibleness is a word with a broader meaning than bendability:

Other hypernyms of bendability include flexibility.

bendability (noun)	flexibleness (noun)
the property of being easily bent without breaking	the property of being flexible; easily bent or shaped
	the quality of being adaptable or variable