Opal glass is a term used to describe a type of glass that is white, opaque, and often used for lampshades, light fixtures, and decorative glassware. Some synonyms for opal glass include milk glass, frosted glass, and satin glass. These terms all describe glass with a similar opaque and milky appearance, but may vary slightly in texture or translucency. Other similar words may include opalescent glass, cloudy glass, and ivory glass. Regardless of the specific term used, opal glass remains a popular material for creating a soft and diffused lighting effect in any interior space.