run over vs geyser

run over is not a noun while geyser is a noun.

Word	Noun	Adjective	Verb	Adverb
run over	No	No	Yes	No
geyser	Yes	No	Yes	No

As verbs, geyser is a hyponym of run over; that is, geyser is a word with a more specific, narrower meaning than run over:

run over (noun)	geyser (noun)
	a spring that discharges hot water and steam

run over (verb)	geyser (verb)
injure or kill by knocking (someone or something) down and passing over the body, as with a vehicle	to overflow like a geyser
flow or run over (a limit or brim)