geyser vs outpouring

geyser and outpouring both are nouns.

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

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

Other hypernyms of geyser include fountain, natural spring, outflow, spring.

geyser (noun)	outpouring (noun)
a spring that discharges hot water and steam	a large flow
	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

geyser (verb)	outpouring (verb)
to overflow like a geyser