Squirrel away is a phrasal verb that means to save, store, or hoard something for future use or to keep it hidden from others. Other synonyms for squirrel away include stash, store up, stockpile, save up, pack away, put aside, cache, keep, accumulate, and preserve. These words are commonly used in situations when one needs to save money or resources for future use, such as during an emergency or for retirement. They can also be used to describe someone who likes to save or hoard things, like money or possessions. Whatever the reason, using these synonyms for squirrel away can help you better express your thoughts or ideas.