Synonyms and related words :
crack, devilishness, devilment, devilry, deviltry, drollery, elfishness, flippancy, foolishness, frivolity, gag, high spirits, impishness, jape, jest, levity, merriment, mischief, mischievousness, playfulness, prankishness, pranksomeness, puckishness, quip, roguery, roguishness, scampishness, sportiveness, trickery, trickiness, waggishness, wisecrack, witticism, yak, youthful spirits