acuity vs acuteness

acuity and acuteness both are nouns.

Word	Noun	Adjective	Verb	Adverb
acuity	Yes	No	No	No
acuteness	Yes	No	No	No

As nouns, acuity and acuteness are synonyms defined as:

Other synonyms of acuity include keenness, sharpness.

acuity (noun)	acuteness (noun)
a quick and penetrating intelligence	the quality of having a sharp edge or point
sharpness of vision; the visual ability to resolve fine detail (usually measured by a Snellen chart)	a quick and penetrating intelligence
	a sensitivity that is keen and highly developed