repository vs sepulchre

repository and sepulchre both are nouns.

Word	Noun	Adjective	Verb	Adverb
repository	Yes	No	No	No
sepulchre	Yes	No	No	No

As nouns, sepulchre is a hypernym of repository; that is, sepulchre is a word with a broader meaning than repository:

Other hypernyms of repository include burial chamber, sepulcher, sepulture.

repository (noun)	sepulchre (noun)
a facility where things can be deposited for storage or safekeeping	a chamber that is used as a grave
a burial vault (usually for some famous person)
a person to whom a secret is entrusted