The word "line" has a range of synonyms that can be used in different contexts. One common synonym is "row," which is used to describe a series of things placed in a straight line. "Queue" is another synonym that is used to describe a line of people waiting for something. "Thread" is used to describe a thin line used for sewing or weaving, while "mark" is used to describe a line drawn on a surface. "Boundary" is commonly used to describe a line that separates two areas or regions. "Route" is used to describe the path of a road, while "track" is used to describe the path of a train. These are just a few examples of the many synonyms for the word "line".