Synonyms for Rascality (same or very similar meaning)
WordNet sense 1 (the trait of indulging in disreputable pranks):
roguishness, prankishnessWordNet sense 2 (the quality of being a slippery rascal):
shiftiness, slipperiness, trickinessWordNet sense 3 (reckless or malicious behavior that causes discomfort or annoyance in others):
devilment, Devilry, deviltry, mischief, mischievousness, roguery, shenanigan, mischief-makingFrom the ODE community, based on WordNetadd/edit