Nouns

(n)belch, belching, burp, burping, eructationa reflex that expels gas noisily from the stomach through the mouth

Verbs

(v)burp, bubble, belch, eructexpel gas from the stomach“Please don't burp at the table”
(v)erupt, belch, extravasatebecome active and spew forth lava and rocks“Vesuvius erupts once in a while”