fountain vs outflow

fountain and outflow both are nouns.

Word	Noun	Adjective	Verb	Adverb
fountain	Yes	No	No	No
outflow	Yes	No	No	No

As nouns, fountain and outflow are synonyms defined as:

Other synonyms of fountain include natural spring, outpouring, spring.

fountain (noun)	outflow (noun)
a plumbing fixture that provides a flow of water	the discharge of a fluid from some container
an artificially produced flow of water	a natural flow of ground water
a structure from which an artificially produced jet of water arises	the process of flowing out
a natural flow of ground water