erupt vs belch

erupt is not a noun while belch is a noun.

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

As verbs, erupt and belch are synonyms defined as:

Other synonyms of erupt include extravasate.

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

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