The term 'Pearly' is used to describe a variety of different materials and objects. IRIDESCENT (10 letters) refers to something that has a rainbow-like sheen or luster, while NACREOUS (8 letters) describes something that has a pearly luster or iridescence. OPALESCENT (10 letters) is a term used to describe something that has a milky, opal-like appearance. SILVER (6 letters) is a metal that often has a pearly sheen. Finally, GATES (5 letters) is a term used to describe the entrance of a castle or other large structure, which is often adorned with pearly decorations.