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1. Water falling in drops from vapour condensed in the atmosphere
   "the mean annual rain";
   - rainfall
    
2. Drops of fresh water that fall as precipitation from clouds
   - rainwater
    
3. Anything happening rapidly or in quick succession
   "a rain of bullets";
   - pelting

1. Precipitate as rain
   "If it rains much more, we can expect some flooding";
   - rain down
    
2. Fall or cause to fall in large quantities

Sounds like: raid, rain, reig

Derived forms: raining, rains, rained

Type of: chronological sequence, chronological succession, come down, downfall, fall, fresh water, freshwater, precipitate, precipitation, sequence, succession, successiveness

Encyclopedia: Rain, Steam, and Speed: The Great Western Railway