eruptive vs eruption

eruptive is not a noun while eruption is a noun.

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

eruptive (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

eruptive (adjective)	eruption (adjective)
produced by the action of fire or intense heat
producing or characterized by eruptions
actively spewing out lava