vault vs sepulchre

vault and sepulchre both are nouns.

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

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

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

vault (noun)	sepulchre (noun)
the act of jumping over an obstacle	a chamber that is used as 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

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