ground water vs spring water

ground water and spring water both are nouns.

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

As nouns, ground water and spring water are synonyms defined as:

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

Other synonyms of ground water include well water.

ground water (noun)	spring water (noun)
underground water that is held in the soil and in pervious rocks	water from a spring
	underground water that is held in the soil and in pervious rocks