water vs spring water

water and spring water both are nouns.

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

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

Other hyponyms of water include branch water, drinking water.

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

water: 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
spring water: underground water that is held in the soil and in pervious rocks

water (noun)	spring water (noun)
a facility that provides a source of water	water from a spring
a liquid necessary for the life of most animals and plants	underground water that is held in the soil and in pervious rocks
the part of the earth's surface covered with water (such as a river or lake or ocean)
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

water (verb)	spring 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