knowingness vs perspicacity

knowingness and perspicacity both are nouns.

Word	Noun	Adjective	Verb	Adverb
knowingness	Yes	No	No	No
perspicacity	Yes	No	No	No

As nouns, perspicacity is a hypernym of knowingness; that is, perspicacity is a word with a broader meaning than knowingness:

knowingness: shrewdness demonstrated by knowledge
perspicacity: intelligence manifested by being astute (as in business dealings)

Other hypernyms of knowingness include astuteness, perspicaciousness, shrewdness.

knowingness (noun)	perspicacity (noun)
having knowledge of	the capacity to assess situations or circumstances shrewdly and to draw sound conclusions
shrewdness demonstrated by knowledge	intelligence manifested by being astute (as in business dealings)