shit vs bunkum

shit and bunkum both are nouns.

Word	Noun	Adjective	Verb	Adverb
shit	Yes	No	Yes	No
bunkum	Yes	No	No	No

As nouns, bunkum is a hypernym of shit; that is, bunkum is a word with a broader meaning than shit:

Other hypernyms of shit include buncombe, bunk, guff, hogwash, rot.

shit (noun)	bunkum (noun)
something of little value	unacceptable behavior (especially ludicrously false statements)
Obscene word for unacceptable behavior
insulting terms of address for people who are stupid or irritating or ridiculous
a coarse term for defecation
a small worthless amount
obscene terms for feces

shit (verb)	bunkum (verb)
have a bowel movement
give away information about somebody