capableness vs grasp

capableness and grasp both are nouns.

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

As nouns, grasp is a hyponym of capableness; that is, grasp is a word with a more specific, narrower meaning than capableness:

Other hyponyms of capableness include perfectibility, compass, range, reach, imperfectibility.

capableness (noun)	grasp (noun)
the quality of being capable -- physically or intellectually or legally	the act of grasping
an aptitude that may be developed	an intellectual hold or understanding
	understanding of the nature or meaning or quality or magnitude of something
	the limit of capability

capableness (verb)	grasp (verb)
	get the meaning of something
	hold firmly