a large number of small animals or insects, usually in motion; throngs of people or things, sometimes of an irritating or annoying nature.
Swag
Swale
Swarm
Swathe
Sweep, Sweepage
Examples: swarm of adders; of fair advantages; of the Anti-Christ; of ants; of bees; of bishops; of their demands; of dust; of eels; of fireflies; of flies; of folk; of footmen; of fowl; of fry; of gnats—Brewer; of heretics; of hornets; of horsemen; of insects; of locusts; of meteorites; of ministers of Christ; of sins; of tiger; of vessels; of wasps.