Stiffenings refer to materials or components that are added to strengthen or reinforce a structure, object, or garment. There are several synonyms for stiffenings, including stiffeners, reinforcements, supports, stays, and bones. Stiffeners are commonly used in construction to enhance the stability of structures and ensure that they can withstand external forces. Similarly, reinforcements are used to strengthen existing structures, such as bridges or buildings, or to fortify materials for added durability. Stays are often used in clothing and textiles to keep the fabric in shape and prevent it from sagging or wrinkling. Bones, on the other hand, are typically used in corsets or shapewear to shape and support the body.