sepulture vs vault

sepulture and vault both are nouns.

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

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

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

sepulture (noun)	vault (noun)
a chamber that is used as a grave	the act of jumping over an obstacle
the ritual placing of a corpse in a grave	an arched brick or stone ceiling or roof
	a burial chamber (usually underground)
	a strongroom or compartment (often made of steel) for safekeeping of valuables

sepulture (verb)	vault (verb)
	bound vigorously
	jump across or leap over (an obstacle)