| opponent(noun, trouble, person, like, conflict) |
| adversary(noun, trouble, person, like, opposition) |
| antagonist(noun, trouble, person, like, opposition) |
| contestant(noun, animal, person, conflict, opposition) |
| rival(noun, trouble, person, like, conflict) |
| enemy(noun, trouble, person, opposition, curse) |
| contender(noun, person, conflict, opposition, job) |
| foe(noun, trouble, person, opposition, agent) |
| combatant(noun, person, tough, opposition, opponent) |
| competition(noun, person, conflict, rival, opponent) |
| entrant(noun, person, opposition, job, application) |
| opposition(noun, person, agent, rebel, criminal) |
| assailant(noun, opposition, agent, villain, rebel) |
| gladiator(noun, combatant, fighter) |
| challenger(noun, animal, person, sport, opposition) |
| bully(noun, combatant, fighter) |
| battler(noun, tough, combatant, fighter, participant) |
| disputant(noun, opposition, agent, villain, rebel) |
| duelist(noun, combatant, fighter) |
| player(noun, animal, person, sport, opposition) |