| cop(noun, law, informal, agent) |
| constable(noun, law, agent, member) |
| flatfoot(noun, law, slang, agent) |
| bull(noun, law, slang, agent) |
| sergeant(agent, major, deputy, informer) |
| fed(force, bear, agent, informer) |
| gumshoe(agent, informer, reporter, copper) |
| Sherlock Holmes(expression, agent, informer, reporter) |
| agent(informer, reporter, gumshoe, investigator) |
| analyst(agent, informer, reporter, gumshoe) |
| bird dog(expression, agent, informer, reporter) |
| bloodhound(agent, informer, reporter, gumshoe) |
| dick(agent, informer, reporter, gumshoe) |
| eavesdropper(agent, informer, reporter, gumshoe) |
| eye(agent, informer, reporter, gumshoe) |
| fink(agent, informer, reporter, gumshoe) |
| informer(agent, gumshoe, investigator, dick) |
| nark(agent, informer, reporter, gumshoe) |
| peeper(agent, informer, reporter, gumshoe) |
| plainclothes officer(expression, agent, informer, reporter) |