erupt vs burst

erupt is not a noun while burst is a noun.

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

As verbs, burst is a hypernym of erupt; that is, burst is a word with a broader meaning than erupt:

Other hypernyms of erupt include explode.

As verbs, erupt and burst are synonyms defined as:

erupt and burst: force out or release suddenly and often violently something pent up

Other synonyms of erupt include break.

erupt (noun)	burst (noun)
	the act of exploding or bursting
	rapid simultaneous discharge of firearms
	a sudden flurry of activity (often for no obvious reason)
	a sudden intense happening

erupt (verb)	burst (verb)
become active and spew forth lava and rocks	come open suddenly and violently, as if from internal pressure
start abruptly	break open or apart suddenly and forcefully
erupt or intensify suddenly	emerge suddenly
become raw or open	burst outward, usually with noise
break out	force out or release suddenly and often violently something pent up
appear on the skin	move suddenly, energetically, or violently
force out or release suddenly and often violently something pent up	cause to burst
start to burn or burst into flames	be in a state of movement or action