Synonyms for Shenanigan (same or very similar meaning)
WordNet sense 1 (the use of tricks to deceive someone (usually to extract money from them)):
chicanery, guile, trickery, wile, chicaneWordNet sense 2 (reckless or malicious behavior that causes discomfort or annoyance in others):
devilment, Devilry, deviltry, mischief, mischievousness, roguery, roguishness, mischief-making, rascalityFrom the ODE community, based on WordNetadd/edit