Synonyms of folly

1 Syllable
bs, vice, hooey
2 Syllables
unthrift, daftness, rashness, madness, misspeak, slip-up, foul-up, screw-up
3 Syllables
idiocy, psychosis, recklessness, dottiness, witlessness, unsoundness, lunacies, foolishness, craziness, psychoses, levity, tommyrot, levities, nonsense, fatuity, lunacy, crudeness, silliness, tactlessness, flapdoodle
4 Syllables
tomfoolery, insanities, insanity, insaneness, psychopathy, facetiousness, indiscretions, obliquity, absurdities, inanity, senselessness, frivolity, imprudence, triviality, absurdity, escapade, wastefulness, profligacy, unwiseness, indiscretion, stupidity, ingenuousness
5 Syllables
prodigality, asininity, preposterousness, extravagance, simplemindedness, imbecility, simple-mindedness
6 Syllables
impracticality, excitability, irrationality
7 Syllables
inadvisability, irresponsibility