| conspirator |
| double agent(noun, expression, plant, agent) |
| eavesdropper(information, agent, gumshoe, investigator) |
| hypocrite(noun, person, fraud, turncoat) |
| infiltrator(noun, plant, mole, detective) |
| intriguer(turncoat, conspirator) |
| mole(noun, plant, agent, operative) |
| quisling(turncoat, conspirator) |
| scout(noun, plant, agent, operative) |
| snoop(noun, plant, agent, gossip) |
| traducer(noun, opposition, agent, villain, rebel) |
| treasonist(turncoat, conspirator) |
| Sherlock Holmes(expression, agent, gumshoe, investigator) |
| analyst(agent, gumshoe, investigator, dick) |
| backslider(fraud, phony, crook, trickster) |
| bird dog(expression, agent, gumshoe, investigator) |
| bloodhound(agent, gumshoe, investigator, dick) |
| bull(agent, gumshoe, investigator, dick) |
| constable(agent, gumshoe, investigator, dick) |
| cop(agent, gumshoe, investigator, dick) |