emergence vs eruption

emergence and eruption both are nouns.

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

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

Other hyponyms of emergence include dissilience.

emergence (noun)	eruption (noun)
the act of coming (or going) out; becoming apparent	the sudden occurrence of a violent discharge of steam and volcanic material
the act of emerging	a sudden very loud noise
the becoming visible	the emergence of a tooth as it breaks through the gum
the gradual beginning or coming forth	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