burp vs belching

burp and belching both are nouns.

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

As nouns, burp and belching are synonyms defined as:

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

Other synonyms of burp include belch, burping, eructation.

burp (noun)	belching (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
	the forceful expulsion of something from inside

burp (verb)	belching (verb)
expel gas from the stomach