Answer:

lunacy

Answer	Crossword Clue
LUNACY	Craziness
LUNACY	Madness
LUNACY	Extreme behavior

LUNACY	Folly
LUNACY	Nuttiness
LUNACY	Utter madness
LUNACY	Marx Brothers trait
LUNACY	Utter foolishness
LUNACY	Extreme foolishness
LUNACY	Sheer stuff?
LUNACY	Extreme foolishness.

LUNACY	Jerry-Lewis-type humor.
LUNACY	Great folly.
LUNACY	Foolishness
LUNACY	Stupidity
LUNACY	Foolish act
LUNACY	Derangement
LUNACY	Extreme folly
LUNACY	Obsolete term for legal insanity

LUNACY	Three Stooges trait