drop vs precipitation

drop and precipitation both are nouns.

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

As nouns, precipitation is a hyponym of drop; that is, precipitation is a word with a more specific, narrower meaning than drop:

Other hyponyms of drop include free fall, plunge.

drop (noun)	precipitation (noun)
the act of dropping something	an unexpected acceleration or hastening
a central depository where things can be left or picked up	overly eager speed (and possible carelessness)
a curtain that can be lowered and raised onto a stage from the flies; often used as background scenery	the act of casting down or falling headlong from a height
a sudden sharp decrease in some quantity	the falling to earth of any form of water (rain or snow or hail or sleet or mist)
a free and rapid descent by the force of gravity	the process of forming a chemical precipitate
a predetermined hiding place for the deposit and distribution of illicit goods (such as drugs or stolen property)	the quantity of water falling to earth at a specific place within a specified period of time
a steep high face of rock
a small indefinite quantity (especially of a liquid)
a shape that is spherical and small

drop (verb)	precipitation (verb)
give birth; used for animals
grow progressively worse
go down in value
stop pursuing or acting
change from one level to another
lower the pitch of (musical notes)
fall or sink into a state of exhaustion or death
leave undone or leave out
omit (a letter or syllable) in speaking or writing
utter with seeming casualness
lose (a game)
take (a drug, especially LSD), by mouth
remove (cargo, people, etc.) from and leave
to remove
cause to fall by or as if by delivering a blow
let or cause to fall in drops
to fall vertically
let fall to the ground
fall or descend to a lower place or level
pay out
stop associating with
terminate an association with
hang loosely