Hidden supply is a term used to describe a collection of items that are kept in a secret or concealed location. The most common words used to describe this concept are STASH, HOARD, and CACHE, all of which have five letters. A STASH is a collection of items that are kept hidden away for future use. Hoarding is the act of collecting and storing large amounts of items, often without any real purpose. Finally, a CACHE is a collection of items that are hidden away for safekeeping.