sharp-sightedness vs vision

sharp-sightedness and vision both are nouns.

Word	Noun	Adjective	Verb	Adverb
sharp-sightedness	Yes	No	No	No
vision	Yes	No	No	No

As nouns, vision is a hypernym of sharp-sightedness; that is, vision is a word with a broader meaning than sharp-sightedness:

sharp-sightedness: sharpness of vision; the visual ability to resolve fine detail (usually measured by a Snellen chart)
vision: the ability to see; the visual faculty

Other hypernyms of sharp-sightedness include sight, visual modality, visual sense.

sharp-sightedness (noun)	vision (noun)
lively attentiveness	the ability to see; the visual faculty
sharpness of vision; the visual ability to resolve fine detail (usually measured by a Snellen chart)	the perceptual experience of seeing
	a vivid mental image
	the formation of a mental image of something that is not perceived as real and is not present to the senses
	a religious or mystical experience of a supernatural appearance