Synonyms and related words :
arch, base, blackguardly, degraded, devilish, elfish, elvish, foolish, full of mischief, high-spirited, impish, infamous, knavish, mischief-loving, mischievous, notorious, playful, prankish, pranksome, pranky, puckish, rascally, recreant, reprobate, roguish, scapegrace, scoundrelly, sportive, trickish, tricksy, vile, villainous, waggish