vault vs bank vault

vault and bank vault both are nouns.

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

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

vault and bank vault: a strongroom or compartment (often made of steel) for safekeeping of valuables

vault (noun)	bank vault (noun)
the act of jumping over an obstacle	a strongroom or compartment (often made of steel) for safekeeping of valuables
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)	bank vault (verb)
bound vigorously
jump across or leap over (an obstacle)