Hive mentality is a term used to describe the behavior of a group of individuals who act as one collective unit. It is based on the idea that each individual in the group is willing to sacrifice their own needs for the benefit of the group. The term is often used to describe the behavior of bees, which work together to build and maintain their hive. The crossword solution SWARM is an appropriate term to describe this type of behavior, as it implies a large group of individuals working together in unison.