The term "ball eye" refers to a round protrusion or bulge on a surface. Synonyms for this term include: bulb, knob, orb, globe, sphere, bead, pellet, marble, and pebble. These words are often used interchangeably when describing small round objects or shapes. The context in which they are used can vary, from discussions of jewelry making to scientific research on the shape of the Earth. Whether describing a smooth, polished sphere or a bumpy, rough pellet, these synonyms allow for a range of vocabulary to describe the shape and texture of objects.