vault vs burial vault

vault and burial vault both are nouns.

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

As nouns, vault and burial vault are synonyms defined as:

vault (noun)	burial vault (noun)
the act of jumping over an obstacle	a burial chamber (usually underground)
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)	burial vault (verb)
bound vigorously
jump across or leap over (an obstacle)