ability vs adaptability

ability and adaptability both are nouns.

Word	Noun	Adjective	Verb	Adverb
ability	Yes	No	No	No
adaptability	Yes	No	No	No

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

ability: the quality of being able to perform; a quality that permits or facilitates achievement or accomplishment
adaptability: the ability to change (or be changed) to fit changed circumstances

ability (noun)	adaptability (noun)
the quality of being able to perform; a quality that permits or facilitates achievement or accomplishment	the ability to change (or be changed) to fit changed circumstances
possession of the qualities (especially mental qualities) required to do something or get something done