| snoop(noun, person, agent, gossip) |
| sleuth(noun, information, agent, scout) |
| bloodhound(noun, agent, informer, reporter) |
| fink(noun, agent, gossip, informer) |
| informer(information, agent, gumshoe, investigator) |
| Sherlock Holmes(expression, agent, informer, reporter) |
| agent(informer, reporter, gumshoe, investigator) |
| analyst(agent, informer, reporter, gumshoe) |
| bird dog(expression, agent, informer, reporter) |
| bull(agent, informer, reporter, gumshoe) |
| constable(agent, informer, reporter, gumshoe) |
| cop(agent, informer, reporter, gumshoe) |
| dick(agent, informer, reporter, gumshoe) |
| eye(agent, informer, reporter, gumshoe) |
| fed(agent, informer, reporter, gumshoe) |
| flatfoot(agent, informer, reporter, gumshoe) |
| gumshoe(agent, sneak, scout, informer) |
| intruder(noun, gossip, nuisance, sneak) |
| nark(noun, agent, informer, reporter) |
| peeper(agent, informer, reporter, gumshoe) |