belching vs belch

belching and belch both are nouns.

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

As nouns, belching and belch are synonyms defined as:

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

Other synonyms of belching include burp, burping, eructation.

belching (noun)	belch (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

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