n. 25B6; verb
onions make me belch : bring up wind; informal BURP; Scottish & N. English informal rift.
the furnace belched flames : EMIT, give off, give out, pour out, discharge, disgorge, spew out, spit out, vomit, cough up; poetic/literary disembogue.
25B6; noun he gave a loud belch : informal BURP; Scottish & N. English informal rift; formal eructation.