A travel bag can be called by a variety of synonyms, depending on its design and purpose. A suitcase is a common synonym, referring to a rectangular or oblong bag typically with a lid and wheels for easy movement. A duffel bag is a cylindrical or rectangular soft-sided bag, often used for sports or gym gear. Backpacks are also a type of travel bag, typically carried on the back with two shoulder straps. A tote bag is a large, versatile bag with two handles, often used for carry-on luggage or weekends away. Finally, a messenger bag is a fashionable and practical option, providing a cross-body strap for hands-free travel.