The term "pack sacks" can be defined as a type of bag that is used for carrying items, particularly while traveling or hiking. There are several synonyms that can be used in place of "pack sacks." A popular term is "backpack," which is a type of bag that is designed to be worn on the back and can hold a variety of items. Other synonyms include duffel bags, knapsacks, rucksacks, and tote bags. Each of these terms refers to a specific type of bag, but they all share the common function of holding and transporting items. Regardless of which term is used, the main purpose of a pack sack is to provide a convenient and portable way to carry belongings.