swarm

A large number of insects, especially when in motion or (for bees) migrating to a new colony.

A mass of people, animals or things in motion or turmoil.

"a swarm of meteorites"

A group of nodes sharing the same torrent in a BitTorrent network.

To move as a swarm.

To teem, or be overrun with insects, people, etc.

To fill a place as a swarm.

To overwhelm as by an opposing army.