outflow vs geyser

outflow and geyser both are nouns.

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

As nouns, geyser is a hyponym of outflow; that is, geyser is a word with a more specific, narrower meaning than outflow:

Other hyponyms of outflow include Fountain of Youth, hot spring, thermal spring.

outflow (noun)	geyser (noun)
the discharge of a fluid from some container	a spring that discharges hot water and steam
a natural flow of ground water
the process of flowing out

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