| Main Entry: | |
| Part of Speech: | noun |
| Definition: | guard; place from which to guard |
| Synonyms: | anchor, beacon, belvedere, case, catbird seat, citadel, crow's nest, cupola, eagle eye, hawk, observance, observation, observatory, outlook, overlook, panorama, patrol, post, scene, scout, sentinel, sentry, spotter, station, surveillance, tip, tower, view, vigil, vigilance, ward, watch, watch person watchtower, watcher, weather eye |
| Main Entry: | scout |
| Part of Speech: | noun |
| Definition: | person who is searching, investigating |
| Synonyms: | advance, adventurer, detective, escort, explorer, guard, lookout, outpost, outrider, patrol, picket, pioneer, precursor, reconnoiterer, recruiter, runner, sleuth, spotter, spy, vanguard |
| Antonyms: | target |
| Main Entry: | spy |
| Part of Speech: | noun |
| Definition: | person who secretly finds out about another's business |
| Synonyms: | agent, detective, double agent, emissary, espionage agent, foreign agent, informer, inside agent, intelligencer, investigator, lookout, mole, observer, operative, patrol, picket, plant*, scout, secret agent, secret service, sleeper, sleuth, snoop, spook, spotter, undercover agent, watcher |
| Main Entry: | watchkeeper |
| Part of Speech: | noun |
| Definition: | person who guards, is on lookout |
| Synonyms: | caretaker, curator, custodian, detective, flagger, guard, keeper, lookout, observer, patrol, picket, police officer, ranger, scout, security guard, security officer, sentinel, sentry, signaller, spotter, spy, ward, warden, watch, watcher |
| Main Entry: | detector |
| Part of Speech: | noun |
| Definition: | indicator |
| Synonyms: | discoverer, locater, pointer, radar, revealer, spotter, warner |
| Main Entry: | finder |
| Part of Speech: | noun |
| Definition: | one who discovers a thing |
| Synonyms: | acquirer, appropriator, claimant, discoverer, search party, spotter |
| Antonyms: | loser, owner, stray |
| Main Entry: | private detective |
| Part of Speech: | noun |
| Definition: | private investigator |
| Synonyms: | PI, Sherlock Holmes, beagle, detective, dick, eye, flatfoot, gumshoe, inquiry agent, inspector, investigator, operative, private dick, private eye, skip tracer, sleuth, sleuthhound, spotter, tec |
| Main Entry: | watchman |
| Part of Speech: | noun |
| Definition: | guard |
| Synonyms: | caretaker, curator, custodian, detective, flagman, guard, keeper, lookout, observer, patrol, patrolman, picket, policeman, ranger, scout, security guard, security man, sentinel, sentry, signalman, spotter, spy, ward, warden, watch, watcher |