antic, caper, capriccio, dido, escapade, frolic, gag, jest, knavery, monkeyshine(s), prank, rag(chiefly British), roguery, shavie(Scottish), shine(s), trick, waggery

skylarkingadventure, experience, game, lark, timehigh jinks(also hijinks), horseplay, play, roughhousing, rowdyismshenanigan(s), tomfooleryjoking, kidding, teasinggambit, hoax, maneuver, ploydeed, feat, mission, performance, stuntcaprice, conceit, fancy, vagary, whim, whimsy(also whimsey)deceit, deception, delusion, fooling, fraud, hanky-panky, hoodwinking, ruse, sham, stratagem, subterfuge, trickery, wile