bunghole vs asshole

bunghole and asshole both are nouns.

Word	Noun	Adjective	Verb	Adverb
bunghole	Yes	No	No	No
asshole	Yes	No	No	No

As nouns, bunghole and asshole are synonyms defined as:

Other synonyms of bunghole include arse, arsehole.

bunghole (noun)	asshole (noun)
a hole in a barrel or cask; used to fill or empty it	vulgar slang for anus
vulgar slang for anus	insulting terms of address for people who are stupid or irritating or ridiculous