noun. A heavy fall of rain.

noun. A pouring down; especially, a heavy or continuous shower.

noun. A pouring or streaming downwards; esp., a heavy or continuous shower.

noun. a heavy rain

verb. To pour down; rain heavily.

noun. a heavy rain

"The trails were deep in mud, the long grass soaking, leaves overhead sending down random showers even in those moments when there was no actual downpour from the sky and the clouds looked like clearing."

rain cats and dogs  

rain  rainfall  

barrage  blizzard  bombardment  cannonade  clamor  

affluence  afflux  affluxion  brash  burst of rain