berth vs fasten

berth is a noun but fasten is not a noun.

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

As verbs, fasten is a hypernym of berth; that is, fasten is a word with a broader meaning than berth:

Other hypernyms of berth include fix, secure.

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

berth (verb)	fasten (verb)
secure in or as if in a berth or dock	make tight or tighter
come into or dock at a wharf	become fixed or fastened
provide with a berth	cause to be firmly attached
	attach to