tractableness vs flexibility

tractableness and flexibility both are nouns.

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

As nouns, tractableness and flexibility are synonyms defined as:

Other synonyms of tractableness include tractability.

tractableness (noun)	flexibility (noun)
the trait of being easily persuaded	the quality of being adaptable or variable
	the property of being flexible; easily bent or shaped
	the trait of being easily persuaded