Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun craziness

3 senses of craziness

Sense 1
craziness, daftness, flakiness -- (informal terms for insanity)
       => insanity -- (relatively permanent disorder of the mind)

Sense 2
folly, foolishness, craziness, madness -- (the quality of being rash and foolish; "trying to drive through a blizzard is the height of folly"; "adjusting to an insane society is total foolishness")
       => stupidity -- (a poor ability to understand or to profit from experience)

Sense 3
folly, foolery, tomfoolery, craziness, lunacy, indulgence -- (foolish or senseless behavior)
       => play, frolic, romp, gambol, caper -- (gay or light-hearted recreational activity for diversion or amusement; "it was all done in play"; "their frolic in the surf threatened to become ugly")