burp vs eructation

burp and eructation both are nouns.

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

As nouns, burp and eructation are synonyms defined as:

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

Other synonyms of burp include belch, belching, burping.

burp (noun)	eructation (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)

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