The term 'secret stockpile' refers to a hidden collection of items that are kept in reserve for future use. It can refer to anything from food and supplies to weapons and ammunition. The two crossword solutions for this term are 'STASH' and 'CACHE'. A STASH is a hidden collection of items, usually kept in a secret location, while a CACHE is a collection of items that is hidden away for safekeeping. Both terms refer to the same concept of a secret stockpile, but they are used in different contexts.