perspicaciousness vs perspicacity

perspicaciousness and perspicacity both are nouns.

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

As nouns, perspicaciousness and perspicacity are synonyms defined as:

perspicaciousness and perspicacity: intelligence manifested by being astute (as in business dealings)

Other synonyms of perspicaciousness include astuteness, shrewdness.

perspicaciousness (noun)	perspicacity (noun)
intelligence manifested by being astute (as in business dealings)	the capacity to assess situations or circumstances shrewdly and to draw sound conclusions
	intelligence manifested by being astute (as in business dealings)