The term 'plaque holder' can be solved by the word 'ENAMEL', which is a type of material used to make decorative items such as jewelry, pottery, and other objects. ENAMEL is a glass-like material that is made from a combination of silica, soda, and lime. It is usually applied to metal or ceramic surfaces and then fired in a kiln to create a hard, glossy finish. Plaque holders are often made from ENAMEL, as it is durable and can be decorated with intricate designs.