| private eye(expression, agent, spy, informer, reporter) |
| private investigator(expression, agent, spy, police, informer) |
| prosecutor(agent, spy, police, informer, reporter) |
| reporter(agent, spy, informer, gumshoe, investigator) |
| roper(agent, spy, police, informer, reporter) |
| scout(agent, spy, informer, reporter, gumshoe) |
| sergeant(agent, spy, police, informer, reporter) |
| shadow(agent, spy, informer, reporter, gumshoe) |
| shamus(agent, spy, police, informer, reporter) |
| shoofly(agent, spy, police, informer, reporter) |
| sleuth(agent, spy, informer, reporter, gumshoe) |
| snoop(agent, spy, informer, reporter, gumshoe) |
| spy(agent, informer, reporter, gumshoe, investigator) |
| tail(agent, spy, informer, reporter, gumshoe) |
| detective(noun, investigator) |