The term "world line" is often used in physics to describe the path of an object through spacetime. However, there are several synonyms that can be used to describe this concept, including space-time path, temporal trajectory, and four-dimensional trajectory. These synonyms describe the same concept as "world line", but offer a more descriptive phrase that can better illustrate the path an object takes in space and time. Additionally, these synonyms can be used interchangeably to describe the same concept and can help to clarify scientific concepts for those who may be unfamiliar with the term "world line".