precipitation
noun.
the quantity of water falling to earth at a specific place within a specified period of time
the storm brought several inches of precipitation
noun.
the process of forming a chemical precipitate
noun.
the falling to earth of any form of water (rain or snow or hail or sleet or mist)
Synonym: downfall
noun.
the act of casting down or falling headlong from a height
noun.
an unexpected acceleration or hastening
he is responsible for the precipitation of his own demise
noun.
overly eager speed (and possible carelessness)
he soon regretted his haste