The term 'A Hidden Store of Things' can be summarized by the word 'CACHE', which is a five-letter noun. A CACHE is a collection of items that are hidden away or stored in a secret place for future use. It is often used to refer to a collection of food, weapons, or other supplies that are kept in a secure location and used in times of need. Caches can also refer to collections of data or information that are stored in a computer's memory for quick access.