precipitation

(noun) the quantity of water falling to earth at a specific place within a specified period of time. Example: "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). Synonyms: downfall.

(noun) the act of casting down or falling headlong from a height.

(noun) an unexpected acceleration or hastening. Example: "He is responsible for the precipitation of his own demise."

(noun) overly eager speed (and possible carelessness). Synonyms: haste, hastiness, hurry, hurriedness. Example: "He soon regretted his haste."