The Collaborative International Dictionary of English v.0.48:
Naughtiness \Naugh"ti*ness\, n. The quality or state of being naughty; perverseness; badness; wickedness. [1913 Webster] I know thy pride, and the naughtiness of thine heart. --1 Sam. xvii. 28. [1913 Webster]WordNet (r) 3.0 (2006):
naughtiness n 1: an attribute of mischievous children [syn: naughtiness, mischievousness, badness]