capability vs potentiality

capability and potentiality both are nouns.

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

As nouns, capability and potentiality are synonyms defined as:

Other synonyms of capability include capableness.

capability (noun)	potentiality (noun)
the quality of being capable -- physically or intellectually or legally	an aptitude that may be developed
an aptitude that may be developed	the inherent capacity for coming into being
the susceptibility of something to a particular treatment