Antonyms for the word "toeing mark" could include "departure point", "finish line", or "goalpost". These words represent the opposite end of a track or field where athletes begin or end their races or events. The departure point is where runners initiate their sprints or hurdles, and the finish line signifies the end of a race, while the goalpost is where soccer players attempt to score. While the toeing mark is used to ensure consistency and fairness in races, its antonyms represent the ultimate destinations for athletes. These antonyms denote the completion of a task, the realization of goals, and the attainment of success.