burp vs burping

burp and burping both are nouns.

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

As nouns, burp and burping are synonyms defined as:

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

Other synonyms of burp include belch, belching, eructation.

burp (noun)	burping (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

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