keenness vs acuity

keenness and acuity both are nouns.

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

As nouns, keenness and acuity are synonyms defined as:

Other synonyms of keenness include acuteness, sharpness.

keenness (noun)	acuity (noun)
thinness of edge or fineness of point	a quick and penetrating intelligence
a quick and penetrating intelligence	sharpness of vision; the visual ability to resolve fine detail (usually measured by a Snellen chart)
a positive feeling of wanting to push ahead with something