The term "round ball" can be used to describe a variety of objects that are spherical in shape. Some synonyms for this term include "sphere," "orb," "globe," "ball," "marble," and "beach ball." Each of these terms can be used to describe a different type of round ball, from a small marble used for playing games to a large beach ball used for summertime fun. The choice of word often depends on the size and context of the object in question. Whether you are describing a sports ball or a decorative ornament, there are many synonyms for "round ball" that can add variety and interest to your writing.