crap vs bunk

crap and bunk both are nouns.

Word	Noun	Adjective	Verb	Adverb
crap	Yes	No	Yes	No
bunk	Yes	No	Yes	No

As nouns, bunk is a hypernym of crap; that is, bunk is a word with a broader meaning than crap:

Other hypernyms of crap include buncombe, bunkum, guff, hogwash, rot.

crap (noun)	bunk (noun)
Obscene word for unacceptable behavior	a bed on a ship or train; usually in tiers
obscene terms for feces	a rough bed (as at a campsite)
	beds built one above the other
	a long trough for feeding cattle
	unacceptable behavior (especially ludicrously false statements)
	a message that seems to convey no meaning

crap (verb)	bunk (verb)
have a bowel movement	flee; take to one's heels; cut and run
	provide with a bunk
	avoid paying