Rock City is often used to refer to a place popularly known for its distinctive rock formation or rock features. There are various synonyms one can use instead of the term Rock City. Some of these synonyms which can be used for Rock City are "Outcropping City," "Stone City," or "Pebble City". Another synonym that can also be used in place of Rock City is "Geological Marvel City" which describes a place or city with exceptional or unique rock formations. In summary, there are several synonyms that can be used instead of Rock City, and they all refer to a place with extraordinary geological features or rock formations.