buffoonery, clownery, clowning, foolery, high jinks(also hijinks), horseplay, horsing around, monkey business, monkeying, monkeyshine(s), roughhouse, roughhousing, shenanigan(s), skylarking, slapstick

childishness, clownishness, foolishness, funning, jesting, joking, nonsense, silliness, waggeryboisterousness, rambunctiousness, rowdiness, rowdyism, rumbustiousness(chiefly British)devilry(or deviltry), impishness, knavery, mischief, mischievousness, prankishness, rascality, roguery, roguishness, trickerycavorting, frivolity, frolicking, gamboling(or gambolling), merrymaking, playfulness, revelry, roistering, romping, sporting, sportiveness