Touchlines refer to the sidelines in sports such as football and rugby. There are several synonyms for this term, including sidelines, out-of-bounds lines, boundary lines, and touch boundaries. In some sports, such as basketball and volleyball, they are known as end lines. Touchlines play an important role in sports as they mark the boundary of the field or court and dictate where the game can be played. They also ensure that players stay within the designated playing area and prevent any disputes about whether a ball or player has gone out of bounds. In short, touchlines are a crucial aspect of sports, and their synonyms are essential to learn for all sports enthusiasts.