| private eye(noun, expression, idiom, agent) |
| gumshoe(noun, agent, informer, reporter) |
| private investigator(noun, expression, idiom, agent) |
| sleuth(noun, agent, informer, reporter) |
| bull(noun, agent, informer, reporter) |
| flatfoot(noun, agent, police, informer) |
| dick(noun, agent, police, informer) |
| cop(noun, agent, informer, reporter) |
| snoop(noun, agent, informer, reporter) |
| analyst(agent, informer, reporter, gumshoe) |
| constable(noun, agent, informer, reporter) |
| Sherlock Holmes(expression, agent, police, informer) |
| agent(informer, reporter, gumshoe, investigator) |
| bird dog(expression, agent, police, informer) |
| bloodhound(agent, police, informer, reporter) |
| eavesdropper(agent, informer, reporter, gumshoe) |
| eye(agent, informer, reporter, gumshoe) |
| fed(agent, police, informer, reporter) |
| fink(agent, informer, reporter, gumshoe) |
| informer(agent, gumshoe, investigator, dick) |