Meaning : A stupid mistake.
Synonyms : betise, foolishness, imbecility, stupidity
Meaning : The quality of being rash and foolish.
Example :
Trying to drive through a blizzard is the height of folly.
Adjusting to an insane society is total foolishness.
Synonyms : craziness, foolishness, madness
Meaning : Foolish or senseless behavior.
Synonyms : craziness, foolery, indulgence, lunacy, tomfoolery