spotter

radar

discoverer locater pointer warner

revealer

acquirer appropriator claimant discoverer

search party

loser owner stray

sentry

anchor beacon belvedere case citadel cupola hawk observance observation observatory outlook overlook panorama patrol post scene scout sentinel station surveillance tip tower view vigil vigilance ward watch watcher

catbird seat crow's nest eagle eye watch person watchtower weather eye

carelessness heedlessness indifference neglect thoughtlessness

sentry

guard lookout patrol scout sentinel ward watch

watchperson

detective gumshoe private eye private investigator sleuth

P.I. Sherlock Holmes beagle dick flatfoot inquiry agent inspector investigator operative private dick skip tracer sleuthhound tec

detective recruiter

advance adventurer escort explorer guard lookout outpost outrider patrol picket pioneer precursor runner sleuth spy vanguard

bird dog reconnoiterer

target

agent detective informer investigator mole operative secret agent secret service undercover agent

emissary lookout observer patrol plant scout sleeper sleuth snoop watcher

double agent espionage agent foreign agent inside agent intelligencer plumber

caretaker curator custodian detective flagger guard keeper lookout observer patrol picket police officer ranger scout security guard security officer sentinel sentry signaller spy ward warden watch watcher

caretaker custodian patrolman policeman warden

curator detective guard keeper lookout observer patrol picket ranger scout sentinel sentry signalman spy ward watch watcher

flagman security guard security man