Synonyms:
- Argus,
- Cassandra,
- Charley,
- Jeremiah,
- admonisher,
- airplane spotter,
- cautioner,
- fire patrolman,
- fire warden,
- fireguard,
- flagman,
- forward observer,
- lighthouse keeper,
- lookout,
- lookout man,
- monitor,
- night watchman,
- patrol,
- patroller,
- patrolman,
- picket,
- prophet of doom,
- roundsman,
- scout,
- sentinel,
- signaler,
- signalman,
- spotter,
- vedette,
- ward,
- warner,
- watch,
- watcher,
- watchkeeper,
- watchman