| underground(noun, secret, subway, subversives) |
| Trojan horse(noun, expression, secret, underground) |
| saboteur(noun, opposition, agent, villain, rebel) |
| saboteurs(noun, opposition, agent, secret, criminal) |
| subversives(noun, secret, underground, subway) |
| collaborators(noun, secret, underground) |
| collaborators of enemy(noun, expression, idiom, secret, underground) |
| infiltrators(noun, secret, underground, subversives) |
| adversary(noun, opposition, agent, rebel, criminal) |
| agent(noun, opposition, villain, rebel, criminal) |
| antagonist(noun, opposition, agent, rebel, criminal) |
| archenemy(noun, opposition, agent, villain, rebel) |
| asperser(noun, opposition, agent, villain, rebel) |
| assailant(noun, opposition, agent, villain, rebel) |
| assassin(noun, opposition, agent, villain, rebel) |
| attacker(noun, opposition, agent, villain, rebel) |
| backbiter(noun, opposition, agent, villain, rebel) |
| bad person(expression, opposition, agent, villain, rebel) |
| bandit(noun, opposition, agent, villain, rebel) |
| betrayer(noun, opposition, agent, villain, rebel) |