Synonyms for Roguishness (same or very similar meaning)
WordNet sense 1 (the trait of indulging in disreputable pranks):
prankishness, rascalityWordNet sense 2 (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