precipitation vs acceleration

precipitation and acceleration both are nouns.

Word	Noun	Adjective	Verb	Adverb
precipitation	Yes	No	No	No
acceleration	Yes	No	No	No

As nouns, acceleration is a hypernym of precipitation; that is, acceleration is a word with a broader meaning than precipitation:

precipitation (noun)	acceleration (noun)
an unexpected acceleration or hastening	the act of accelerating; increasing the speed
overly eager speed (and possible carelessness)	an increase in rate of change
the act of casting down or falling headlong from a height	(physics) a rate of increase of velocity
the falling to earth of any form of water (rain or snow or hail or sleet or mist)
the process of forming a chemical precipitate
the quantity of water falling to earth at a specific place within a specified period of time