Safe deposit vaults are a secure and reliable way to store valuable items. However, there are several other synonyms for safe deposit vaults such as strongboxes, lockboxes, safety deposit boxes, and strongrooms. Each of these terms describes a secure space used to store valuable items such as documents, jewelry, or other important items. Strongboxes are typically made of metal and are designed to resist physical attacks whereas safety deposit boxes are typically found in banks and require a key or code to access. Ultimately, whichever synonym you choose to use, the decision to secure your valuables in a safe deposit vault is a wise one.