belch vs erupt

belch is a noun but erupt is not a noun.

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

As verbs, belch and erupt are synonyms defined as:

Other synonyms of belch include extravasate.

belch (noun)	erupt (noun)
a reflex that expels gas noisily from the stomach through the mouth

belch (verb)	erupt (verb)
expel gas from the stomach	become active and spew forth lava and rocks
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