There are several synonyms for the phrase "piece of change." For instance, it can also be referred to as a small amount of money, chump change, loose coins, or spare change. These phrases all refer to a small sum of money or a few coins that are typically left over after making a purchase. The term chump change can be considered a derogatory term for a small amount of money. Meanwhile, spare change refers to extra money, which can be given to charity or used for something else. Regardless of the term used, a piece of change is generally of trivial value and not considered significant.