The word "overrun" refers to a situation where something is flooded or flooded with a large number of people or things, beyond its capacity to handle them. Some synonyms for "overrun" include "inundated," "overwhelmed," "flooded," "swamped," and "overloaded." These words describe a state where a place, system, or person is unable to cope with the number of people or things that are present or needed. For instance, a city might be overrun with tourists during peak season, a website might be inundated with traffic, a phone line might be overwhelmed by too many calls, a team might be swamped with work, or a machine might get overloaded with too much power.