MASSACRE

Murder : the unlawful premeditated killing of one human being by another.
Stab : thrust a knife or other pointed weapon into (someone) so as to wound or kill.
Assassinate : murder (an important person) for political or religious reasons.
Slaughter : kill (people or animals) in a cruel or violent way, typically in large numbers.
Massacre : an indiscriminate and brutal slaughter of many people.


Synonym of Massacre is Slaughter