There are many different synonyms for the phrase "disk shape". Some of the most commonly used words include circular, discoid, disc-shaped, rounded, and flat. Other options include saucer-shaped, pancake-like, wafer-thin, and roundish. Each of these words has its own unique connotation and can be used to describe slightly different shapes or variations on the classic disk shape. Depending on the context, some words may be more appropriate than others. For example, "discoid" might be more suitable for describing a flat, circular shape with slightly rounded edges, while "pancake-like" might be a better choice for a thicker, more substantial disk shape.