acumen vs astuteness

acumen and astuteness both are nouns.

Word	Noun	Adjective	Verb	Adverb
acumen	Yes	No	No	No
astuteness	Yes	No	No	No

As nouns, astuteness is a hypernym of acumen; that is, astuteness is a word with a broader meaning than acumen:

acumen: shrewdness shown by keen insight
astuteness: intelligence manifested by being astute (as in business dealings)

Other hypernyms of acumen include perspicaciousness, perspicacity, shrewdness.

acumen (noun)	astuteness (noun)
shrewdness shown by keen insight	intelligence manifested by being astute (as in business dealings)
a tapering point	the intellectual ability to penetrate deeply into ideas