eructation vs burp

eructation and burp both are nouns.

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

As nouns, eructation and burp are synonyms defined as:

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

Other synonyms of eructation include belch, belching, burping.

eructation (noun)	burp (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)

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