downpour (n.)
- affluence
- cascade
- cataract
- chute
- cloudburst
- collapse
- comedown
- concourse
- confluence
- conflux
- course
- crash
- crosscurrent
- current
- debacle
- declension
- declination
- deluge
- descension
- descent
- down
- downfall
- downgrade
- downturn
- drift
- driftage
- drop
- dropping
- fall
- flood
- flow
- flowing
- fluency
- flux
- gravitation
- gush
- inclination
- inflow
- inundation
- millrace
- monsoon
- onrush
- outflow
- plash
- pounce
- pour
- race
- rainstorm
- rapids
- run
- rush
- scud
- set
- soaker
- spate
- spout
- stoop
- stream
- surge
- swoop
- thunderstorm
- tide
- torrent
- trend
- undercurrent
- undertow
- waterfall
- waterspout
