| deceiver(noun, source, fraud, phony) |
| dick(agent, gumshoe, investigator) |
| eye(agent, gumshoe, investigator, dick) |
| fed(agent, gumshoe, investigator, dick) |
| flatfoot(agent, gumshoe, investigator, dick) |
| gumshoe(agent, investigator, dick) |
| impostor(fraud, phony, crook, trickster) |
| operative(noun, plant, agent, mole) |
| peeper(agent, gumshoe, investigator, dick) |
| plainclothes officer(expression, agent, gumshoe, investigator) |
| police officer(expression, agent, gumshoe, investigator) |
| private eye(expression, agent, gumshoe, investigator) |
| private investigator(expression, agent, gumshoe, investigator) |
| rebel(noun, opposition, agent, villain) |
| roper(agent, gumshoe, investigator, dick) |
| sergeant(agent, gumshoe, investigator, dick) |
| shadow(agent, gumshoe, investigator, dick) |
| shamus(agent, gumshoe, investigator, dick) |
| shoofly(agent, gumshoe, investigator, dick) |
| sleuth(noun, information, plant, agent) |