| apostate(impostor, renegade, turncoat, hypocrite) |
| back-stabber(impostor, renegade, turncoat, hypocrite) |
| backslider(impostor, renegade, turncoat, hypocrite) |
| bird dog(expression, agent, informer, reporter) |
| bloodhound(agent, informer, reporter, gumshoe) |
| bull(agent, informer, reporter, gumshoe) |
| conspirator(impostor, renegade, turncoat, hypocrite) |
| constable(agent, informer, reporter, gumshoe) |
| cop(agent, informer, reporter, gumshoe) |
| deceiver(source, sneak, informer, rat) |
| defector(impostor, renegade, turncoat, hypocrite) |
| deserter(impostor, renegade, turncoat, hypocrite) |
| dick(agent, informer, reporter, gumshoe) |
| eye(agent, informer, reporter, gumshoe) |
| fed(agent, informer, reporter, gumshoe) |
| flatfoot(agent, informer, reporter, gumshoe) |
| gumshoe(agent, informer, reporter, investigator) |
| hypocrite(impostor, renegade, turncoat, conspirator) |
| intriguer(impostor, renegade, turncoat, hypocrite) |
| peeper(agent, informer, reporter, gumshoe) |