berth vs bunk

berth and bunk both are nouns.

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

As nouns, berth and bunk are synonyms defined as:

Other synonyms of berth include built in bed.

berth (noun)	bunk (noun)
a job in an organization	a bed on a ship or train; usually in tiers
a bed on a ship or train; usually in tiers	a rough bed (as at a campsite)
a place where a craft can be made fast	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

berth (verb)	bunk (verb)
secure in or as if in a berth or dock	flee; take to one's heels; cut and run
come into or dock at a wharf	provide with a bunk
provide with a berth	avoid paying