| Main Entry: | |
| Part of Speech: | noun |
| Definition: | foolishness |
| Synonyms: | absurdity, absurdness, bunk, carrying-on, claptrap, craziness, dumb trick, folly, fool trick, foolery, horse feathers, idiocy, impracticality, imprudence, inanity, indiscretion, insanity, insensibility, irrationality, irresponsibility, ludicrousness, lunacy, madness, mistake, nonsense, poppycock, preposterousness, rubbish*, senselessness, silliness, stupidity, tomfoolery, tommyrot, twaddle, unreasonableness, unwiseness, weakness*, witlessness, zaniness |
| Main Entry: | dotage |
| Part of Speech: | noun |
| Definition: | feebleness, old age |
| Synonyms: | advanced age, decrepitude, elderliness, fatuity, imbecility, infirmity, second childhood, senectitude, senility, weakness |
| Antonyms: | childhood, strength, youngness, youth, youthfulness |
| Main Entry: | folly |
| Part of Speech: | noun |
| Definition: | nonsense, ridiculous idea |
| Synonyms: | absurdity, craziness, daftness, dottiness, dumb thing to do, dumb trick, fatuity, foolishness, idiocy, imbecility, impracticality, imprudence, inadvisability, inanity, indiscretion, irrationality, lunacy, madness, obliquity, preposterousness, rashness, recklessness, senselessness, silliness, stupidity, triviality, unsoundness, vice, witlessness |
| Antonyms: | judgment, knowledge, seriousness, understanding, wisdom |
| Main Entry: | idiocy |
| Part of Speech: | noun |
| Definition: | utter stupidity |
| Synonyms: | asininity, cretinism, derangement, fatuity, fatuousness, foolishness, imbecility, inanity, insanity, insipidity, lunacy, madness, senselessness, tomfoolery |
| Antonyms: | brains, intelligence |
| Main Entry: | lunacy |
| Part of Speech: | noun |
| Definition: | craziness, madness |
| Synonyms: | aberration, absurdity, alienation, asininity, dementia, derangement, distraction, fatuity, folly, foolhardiness, foolishness, idiocy, imbalance, imbecility, inanity, ineptitude, insanity, mania, psychopathy, psychosis, senselessness, silliness, stupidity |
| Antonyms: | saneness |
| Main Entry: | stupidity |
| Part of Speech: | noun |
| Definition: | dullness of mind |
| Synonyms: | absurdity, apathy, asininity, battiness, brainlessness, doltishness, fatuity, fatuousness, feeble-mindedness, idiocy, ignorance, imbecility, imprudence, incapacity, ineptitude, injudiciousness, insensibility, lunacy, nitwittedness, nonsense, obtuseness, puerility, shallowness, silliness, simplicity, slowness, slowness, sluggishness, stolidity, stupefaction, stupidness, stupor, thick-headedness, weak-mindedness, weakness |
| Antonyms: | intelligence, judgment, wisdom |
| Main Entry: | stupidity |
| Part of Speech: | noun |
| Definition: | extreme folly |
| Synonyms: | absurdity, asininity, frivolity, giddiness, idiocy, imbecility, ineptitude, irrationality, ludicrousness, lunacy, madness, nonsense, nonsensicality, senselessness, silliness, simplicity, witlessness |
| Antonyms: | acumen, canniness, shrewdness |
| Main Entry: | stupidity |
| Part of Speech: | noun |
| Definition: | stupid act |
| Synonyms: | folly, foolishness, imbecility, madness, misguidedness |
| Main Entry: | craziness |
| Part of Speech: | noun |
| Definition: | foolishness |
| Synonyms: | absurdity, brainlessness, flakiness, foolery, idiocy, imbecility, insanity, lunacy, madness, nonsense, nuttiness, senselessness, silliness, tomfoolery, wackiness, zaniness |