slyness vs perspicacity

slyness and perspicacity both are nouns.

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

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

slyness: shrewdness as demonstrated by being skilled in deception
perspicacity: intelligence manifested by being astute (as in business dealings)

Other hypernyms of slyness include astuteness, perspicaciousness, shrewdness.

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