Synonyms of foolery

1 Syllable
prank
2 Syllables
gaming, mischief, antics
3 Syllables
poppycock, nuttiness, wackiness, flakiness, foolishness, craziness, absurdness, carrying-on, tommyrot, nonsense, horseplay, lunacy, silliness
4 Syllables
tomfoolery, insanity, buffoonery, ridicule, hanky-panky, inanity, hokey-pokey, senselessness, ludicrousness, misbehavior, mischief-making, monkeyshine, absurdity, unwiseness, stupidity
5 Syllables
disobedience, imbecility
7 Syllables
irresponsibility