1. Agony (intense suffering)
2. Agonize (to suffer greatly)
3. Agonistic (relating to a contest or struggle)
4. Agonist (a person who competes in a contest)
5. Agonizing (causing intense suffering)
6. Agonal (relating to the struggle of dying)
7. Agonophobia (fear of pain)
8. Agonistic (characterized by struggle or conflict)
9. Agonothete (an official who oversees a contest)
10. Agonal respiration (irregular breathing pattern often occurring near death)