* Social interaction: This is a general term for any kind of communication or activity between two or more people. It can range from simple exchanges to complex social relationships.
* Social action: This term, coined by Max Weber, refers to actions that are meaningful to the individual and take into account the actions and reactions of others.
* Collective behavior: This term refers to the spontaneous and unstructured behavior of a group of people in response to a shared event or situation. Examples include riots, crowds, and fads.
* Social movements: These are organized, sustained campaigns to achieve social change. They often involve collective action and can be based on shared values, beliefs, or interests.
* Cooperation: This refers to a type of social interaction where individuals work together towards a common goal.
* Conflict: This refers to a type of social interaction where individuals or groups compete for scarce resources, power, or status.
The best term to use depends on the specific situation. For example, if you're describing how people act together in a line at the grocery store, "social interaction" would be appropriate. But if you're describing how people act together in a protest against a new law, "collective behavior" or "social movement" might be more fitting.