amenableness vs amenability

amenableness and amenability both are nouns.

Word	Noun	Adjective	Verb	Adverb
amenableness	Yes	No	No	No
amenability	Yes	No	No	No

As nouns, amenableness and amenability are synonyms defined as:

Other synonyms of amenableness include cooperativeness.

amenableness (noun)	amenability (noun)
the trait of being cooperative	the trait of being cooperative