Over swarming refers to an excessive amount of something, usually living beings such as insects, animals, or people. The antonyms for over swarming are underpopulated, sparse, and empty. Underpopulated implies a lack of inhabitants or population, while sparse indicates a small number of things scattered sparsely in an area. Empty suggests a complete absence of the subject in question, which could be a space, a room, or even a city. In contrast to over swarming, these antonyms suggest a sense of spaciousness, calmness, and tranquility. These words are useful for describing areas with lesser amounts of activity and population.