outflow vs outpouring

outflow and outpouring both are nouns.

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

As nouns, outpouring is a hypernym of outflow; that is, outpouring is a word with a broader meaning than outflow:

Other hypernyms of outflow include discharge, run.

As nouns, outflow and outpouring are synonyms defined as:

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

outflow (noun)	outpouring (noun)
the discharge of a fluid from some container	a large flow
a natural flow of ground water	the rapid and continuous delivery of linguistic communication (spoken or written)
the process of flowing out	the pouring forth of a fluid
	a sudden rapid flow (as of water)
	a natural flow of ground water