erupt vs eruption

erupt is not a noun while eruption is a noun.

Word	Noun	Adjective	Verb	Adverb
erupt	No	No	Yes	No
eruption	Yes	No	No	No

erupt (noun)	eruption (noun)
	the sudden occurrence of a violent discharge of steam and volcanic material
	a sudden very loud noise
	the emergence of a tooth as it breaks through the gum
	a sudden violent spontaneous occurrence (usually of some undesirable condition)
	(of volcanoes) pouring out fumes or lava (or a deposit so formed)
	symptom consisting of a breaking out and becoming visible

erupt (verb)	eruption (verb)
become active and spew forth lava and rocks
start abruptly
erupt or intensify suddenly
become raw or open
break out
appear on the skin
force out or release suddenly and often violently something pent up
start to burn or burst into flames