'eight' - used as a noun
a group of United States painters founded in 1907 and noted for their realistic depictions of sordid aspects of city life
the cardinal number that is the sum of seven and one
The reason why locusts swarm are because when they are in groups, a "hot-spot" behind their hind legs is stimulated, which in turn causes their destructive nature. A large swarm of locusts can eat eighty thousand tons of corn in a day.