outflow vs fountain

outflow and fountain both are nouns.

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

As nouns, outflow and fountain are synonyms defined as:

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

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