capability vs capableness

capability and capableness both are nouns.

Word	Noun	Adjective	Verb	Adverb
capability	Yes	No	No	No
capableness	Yes	No	No	No

As nouns, capability and capableness are synonyms defined as:

capability and capableness: the quality of being capable -- physically or intellectually or legally

As nouns, capability and capableness are synonyms defined as:

Other synonyms of capability include potentiality.

capability (noun)	capableness (noun)
the quality of being capable -- physically or intellectually or legally	the quality of being capable -- physically or intellectually or legally
an aptitude that may be developed	an aptitude that may be developed
the susceptibility of something to a particular treatment