slyness vs perspicaciousness

slyness and perspicaciousness both are nouns.

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

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

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

Other hypernyms of slyness include astuteness, perspicacity, shrewdness.

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