eructation vs belching

eructation and belching both are nouns.

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

As nouns, eructation and belching are synonyms defined as:

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

Other synonyms of eructation include belch, burp, burping.

eructation (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
(of volcanoes) pouring out fumes or lava (or a deposit so formed)	the forceful expulsion of something from inside