custodianship vs berth

custodianship and berth both are nouns.

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

As nouns, berth is a hypernym of custodianship; that is, berth is a word with a broader meaning than custodianship:

Other hypernyms of custodianship include office, place, position, post, situation.

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

custodianship (verb)	berth (verb)
	secure in or as if in a berth or dock
	come into or dock at a wharf
	provide with a berth