Synonyms for Misbehavior:

n.

excess, enormity, immorality, sin, decadence, villainy, depravity, wrong, evil, iniquity. misconduct, wrongdoing, Misdoing, horseplay, naughtiness, good. act (noun)
misdeed, misbehaviour.
crime (noun)
misdeed.
misbehavior (noun)
misdeed, misbehaviour.
misconduct (noun)
wrongdoing.
naughty act, conduct (noun)
misconduct, Misdoing, naughtiness, misdeed, fault, wrongdoing, mischief, immorality.
transgression (noun)
mischief, misconduct, fault.

Other synonyms:

naughtiness. Misdoing, wrongdoing, horseplay, misconduct. prankishness
mischief.
Other relevant words:
misconduct, immorality, naughtiness, wrong, fault, wrongdoing, horseplay, Misdoing, mischief, sin.