What is another word for bank vault?
Pronunciation: [bˈaŋk vˈɒlt] (IPA) 
A bank vault is a heavily fortified and secure storage area designed to protect valuable assets such as cash, jewels, and important documents. There are several synonyms for bank vault, including safe, strongroom, vault, treasure-house, and repository. Each of these terms suggests a secure location where sensitive or valuable items can be stored safely. A safe is typically smaller than a bank vault and may be located in a home or business, while a strongroom or vault is typically larger and designed to hold larger volumes of items. A treasure-house suggests a location where valuable items such as gold or jewels are stored, while a repository implies a location where important documents are stored for safekeeping.
