A REPOSITORY is a place for safekeeping, typically used to store items of value. It is usually a large, secure space, such as a room or building, and can be referred to as a 10-letter word. A VAULT is a smaller, more secure version of a REPOSITORY, and is often used to store money or other valuables. It is a 5-letter word. A CACHE is also a place for safekeeping, but it is usually a hidden or secret location, and is also a 5-letter word.