Antonyms for leisure activities would include work, labor, toil, employment, and occupation. These are activities that are done out of necessity rather than for fun or relaxation. Other antonyms for leisure activities might include obligations, responsibilities, chores, and duties, which also imply a sense of obligation and duty rather than enjoyment or pleasure. While leisure activities can be a source of fun and relaxation, the antonyms for leisure activities often represent the less enjoyable aspects of life that we must all endure at some point, whether it is going to work or fulfilling obligations to family or community.