1. Massacre: This term implies a large-scale killing of many people, often in a short period of time and without discrimination.
2. Genocide: This refers to the deliberate and systematic killing of a large group of people, typically targeting an entire ethnic group, religious group, or national group.
3. Mass murder: This term refers to the killing of four or more people at one time and in one location, often with no clear motive. This can include events like school shootings, workplace violence, or hate crimes.
4. Killing spree: This is a series of murders that occur in a relatively short period of time, often in multiple locations. The killer may have a specific target or a pattern of behavior.
5. Organized crime: This involves a group of individuals who engage in criminal activities, including murder, for financial gain or other reasons. This can include gangs, cartels, or other organized criminal organizations.
6. War crimes: This refers to acts of violence committed during war, such as the deliberate targeting of civilians or the use of chemical weapons.
7. Terrorist attack: This involves violence carried out for political or ideological reasons, often targeting civilians.
It's important to remember that the term "collective act of murders" is a general term and can be used to refer to a wide range of events. The specific context and intent of the killings will determine the appropriate term to use.
It's also important to be mindful of the sensitivity surrounding these topics and avoid using language that could be considered insensitive or offensive.