grasp vs capability

grasp and capability both are nouns.

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

As nouns, capability is a hypernym of grasp; that is, capability is a word with a broader meaning than grasp:

Other hypernyms of grasp include capableness, potentiality.

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

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