- folly, foolishness, unwiseness - the trait of acting stupidly or rashly
--1 is a kind of trait
--1 has particulars:indiscretion, injudiciousness; absurdity, fatuity, fatuousness, silliness - folly, foolishness, craziness - the quality of being rash and foolish
--2 is a kind of stupidity
- stupidity, betise, folly, foolishness, imbecility - a stupid mistake
--3 is a kind of mistake, error, fault