lost-and-found vs repository

lost-and-found and repository both are nouns.

Word	Noun	Adjective	Verb	Adverb
lost-and-found	Yes	No	No	No
repository	Yes	No	No	No

As nouns, repository is a hypernym of lost-and-found; that is, repository is a word with a broader meaning than lost-and-found:

lost-and-found: repository in a public building where lost articles can be kept until their owners reclaim them
repository: a facility where things can be deposited for storage or safekeeping

Other hypernyms of lost-and-found include deposit, depositary, depository.

lost-and-found (noun)	repository (noun)
repository in a public building where lost articles can be kept until their owners reclaim them	a facility where things can be deposited for storage or safekeeping
	a burial vault (usually for some famous person)
	a person to whom a secret is entrusted