belch vs burp

belch and burp both are nouns.

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

As nouns, belch and burp are synonyms defined as:

belch and burp: a reflex that expels gas noisily from the stomach through the mouth

Other synonyms of belch include belching, burping, eructation.

As verbs, belch and burp are synonyms defined as:

Other synonyms of belch include bubble, eruct.

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

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