Deed boxes are used to store important legal documents, contracts or deeds, and other confidential paperwork. There are several synonyms for the word deed box, including safe deposit box, security box, document chest, strongbox, and safe box. A safe deposit box is a safekeeping facility provided by banks, where clients can store their valuables and important documents. A security box is a small metal container that locks and provides a secure place to store small valuable items. Similarly, a document chest is a sturdy box designed for storing documents, contracts or deeds, and other papers. Strongboxes and safe boxes are other synonyms for a deed box, usually used for storing larger or heavy-duty objects.