As nouns the difference between folly and fatuity
is that folly
is while fatuity
is weakness or imbecility of mind; stupidity.
Thoughtless action resulting in tragic consequence.
- This is a war of folly .
A fanciful building built for purely ornamental reasons.
- The purchase of Alaska from Russia was termed Seward's folly.
- A luncheonette in the shape of a coffee cup is particularly conspicuous, as is intended of an architectural duck or folly .
Weakness or imbecility of mind; stupidity.