shut vs bung

shut is not a noun while bung is a noun.

Word	Noun	Adjective	Verb	Adverb
shut	No	Yes	Yes	No
bung	Yes	No	Yes	No

As verbs, bung is a hyponym of shut; that is, bung is a word with a more specific, narrower meaning than shut:

Other hyponyms of shut include snap, slat, bang, slam, shutter, draw, roll up, seal, seal off.

shut (noun)	bung (noun)
	a plug used to close a hole in a barrel or flask

shut (adjective)	bung (adjective)
not open
used especially of mouth or eyes

shut (verb)	bung (verb)
move so that an opening or passage is obstructed; make shut	close with a cork or stopper
become closed	give a tip or gratuity to in return for a service, beyond the compensation agreed on
prevent from entering; shut out