Precipitation

n.	1.	The act of precipitating, or the state of being precipitated, or thrown headlong. In peril of precipitation From off rock Tarpeian. - Shak.
	2.	A falling, flowing, or rushing downward with violence and rapidity. The hurry, precipitation, and rapid motion of the water, returning . . . towards the sea. - Woodward.
	3.	Great hurry; rash, tumultuous haste; impetuosity.
	4.	(Chem.) The act or process of precipitating from a solution.
	5.	(Meteorology) A deposit on the earth of hail, mist, rain, sleet, or snow; also, the quantity of water deposited.

Noun	1.	precipitation - the quantity of water falling to earth at a specific place within a specified period of time; "the storm brought several inches of precipitation"
	2.	precipitation - the process of forming a chemical precipitate
	3.	precipitation - the falling to earth of any form of water (rain or snow or hail or sleet or mist) Synonyms: downfall
	4.	precipitation - the act of casting down or falling headlong from a height
	5.	precipitation - an unexpected acceleration or hastening; "he is responsible for the precipitation of his own demise"
	6.	precipitation - overly eager speed (and possible carelessness); "he soon regretted his haste" Synonyms: haste, hastiness, hurriedness, hurry

Scotch mist, abruptness, air speed, alacrity, alluvion, alluvium, ash, blood rain, carelessness, celerity, cinder, clinker, deposit, deposition, deposits, desperateness, devil-may-careness, diluvium, dispatch, downcast, downpour, downthrow, draff, dregs, drizzle, dross, ember, evening mist, expedition, expeditiousness, fall, fastness, feces, feverishness, flight, flit, flurry, forwardness, froth, furiousness, gout of rain, ground speed, grounds, hail, haste, hastiness, heedlessness, hotheadedness, hurriedness, hurry, impatience, impetuosity, impetuousness, impulse, impulsiveness, instantaneousness, knots, lees, lightning speed, loess, miles per hour, mist, misty rain, mizzle, moisture, moraine, offscum, overeagerness, overenthusiasm, overhastiness, overthrow, overturn, overzealousness, patter, pitter-patter, precipitance, precipitancy, precipitate, precipitateness, precipitousness, precociousness, precocity, prematureness, prematurity, promptitude, promptness, quickness, rain, raindrop, rainfall, rainwater, rapidity, rashness, recklessness, round pace, rpm, rush, scoria, scum, sediment, sedimentation, settlings, sheet of rain, shower, showers, silt, sinter, slag, sleet, smut, snappiness, snow, snowfall, soot, speed, speediness, splatter, sprinkle, sublimate, suddenness, swift rate, swiftness, unfrozen hydrometeor, untimeliness, velocity, wantonness, wet, wildness