reservoir vs water

reservoir and water both are nouns.

Word	Noun	Adjective	Verb	Adverb
reservoir	Yes	No	No	No
water	Yes	No	Yes	No

reservoir (noun)	water (noun)
tank used for collecting and storing a liquid (as water or oil)	a facility that provides a source of water
lake used to store water for community use; a lake (natural or artificial) used to store water and used as a source of water	a liquid necessary for the life of most animals and plants
anything (a person or animal or plant or substance) in which an infectious agent normally lives and multiplies	the part of the earth's surface covered with water (such as a river or lake or ocean)
a large or extra supply of something	binary compound that occurs at room temperature as a clear colorless odorless tasteless liquid; freezes into ice below 0 degrees centigrade and boils above 100 degrees centigrade; widely used as a solvent
	liquid excretory product
	once thought to be one of four elements composing the universe (Empedocles), associated with the humour phlegm

reservoir (verb)	water (verb)
	secrete or form water, as tears or saliva
	supply with water, as with channels or ditches or streams
	fill with tears
	provide with water