alphabet of rats

An 'alphabet of rats' is the collective noun for a group of rats. Because rats barrel, belt, blast, blaze, blow, bolt, bomb, bowl, breeze, bundle, bustle, buzz, cannonball, careen, career, chase, course, crack, dash, drive, fly, hare, hasten, hie, highball, hotfoot, hump, hurl, hurry, hurtle, hustle, jet, jump, motor, nip, pelt, race, ram, rip, rocket, run, rush, rustle, scoot, scurry, shoot, speed, step, tear, travel, trot, whirl, whisk, zip, zoom around.

I was overwhelmed by an alphabet of rats in the alley.