Bank vault and Trust company

Bank vault noun - A strongroom or compartment (often made of steel) for safekeeping of valuables.

Trust company and bank vault are semantically related. In some cases you can use "Trust company" instead a noun phrase "Bank vault".

Trust company noun - An organization (usually with a commercial bank) that is engaged as a trustee or fiduciary or agent in handling trust funds or estates of custodial arrangements or stock transfers or related services.

Bank vault and trust company are semantically related. You can use "Bank vault" instead a noun phrase "Trust company".