skill vs ability

skill and ability both are nouns.

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

As nouns, ability is a hypernym of skill; that is, ability is a word with a broader meaning than skill:

skill: ability to produce solutions in some problem domain
ability: possession of the qualities (especially mental qualities) required to do something or get something done

Other hypernyms of skill include power.

As nouns, ability is a hypernym of skill; that is, ability is a word with a broader meaning than skill:

skill: an ability that has been acquired by training
ability: possession of the qualities (especially mental qualities) required to do something or get something done

Other hypernyms of skill include power.

skill (noun)	ability (noun)
ability to produce solutions in some problem domain	the quality of being able to perform; a quality that permits or facilitates achievement or accomplishment
an ability that has been acquired by training	possession of the qualities (especially mental qualities) required to do something or get something done