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