overflow vs outpouring

overflow and outpouring both are nouns.

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

As nouns, overflow and outpouring are synonyms defined as:

Other synonyms of overflow include flood.

overflow (noun)	outpouring (noun)
a large flow	a large flow
the occurrence of surplus liquid (as water) exceeding the limit or capacity	the rapid and continuous delivery of linguistic communication (spoken or written)
	the pouring forth of a fluid
	a sudden rapid flow (as of water)
	a natural flow of ground water

overflow (verb)	outpouring (verb)
overflow with a certain feeling
flow or run over (a limit or brim)