sharp-sightedness vs acuity

sharp-sightedness and acuity both are nouns.

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

As nouns, sharp-sightedness and acuity are synonyms defined as:

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

Other synonyms of sharp-sightedness include visual acuity.

sharp-sightedness (noun)	acuity (noun)
lively attentiveness	a quick and penetrating intelligence
sharpness of vision; the visual ability to resolve fine detail (usually measured by a Snellen chart)	sharpness of vision; the visual ability to resolve fine detail (usually measured by a Snellen chart)