strongroom vs vault

strongroom and vault both are nouns.

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

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

strongroom: a burglarproof and fireproof room in which valuables are kept
vault: a strongroom or compartment (often made of steel) for safekeeping of valuables

Other hyponyms of strongroom include bank vault.

strongroom (noun)	vault (noun)
a burglarproof and fireproof room in which valuables are kept	the act of jumping over an obstacle
	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

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