sepulture vs repository

sepulture and repository both are nouns.

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

As nouns, repository is a hyponym of sepulture; that is, repository is a word with a more specific, narrower meaning than sepulture:

Other hyponyms of sepulture include crypt, mausoleum, monument, burial vault, vault.

sepulture (noun)	repository (noun)
a chamber that is used as a grave	a facility where things can be deposited for storage or safekeeping
the ritual placing of a corpse in a grave	a burial vault (usually for some famous person)
	a person to whom a secret is entrusted