Cyma reversa is a Greek term commonly used in architecture to describe a type of curved molding that resembles an S-shape. This ornamental molding has been widely used throughout history, especially in Renaissance-era buildings. Some common synonyms for this term include cyma recta, ogee, and double curve. Although these terms may differ in technical definition, they all refer to a similar architectural feature. Cyma recta is a concave molding with a smooth curve, ogee is a molding with an S-shaped profile, and double curve refers to a molding with both convex and concave curves. These synonyms may be used interchangeably depending on the specific context and regional preferences.