sentries
Armed perimeter monitors
Sentries is the plural of sentry—a guard stationed to watch for danger or control access to a place.
Sentries stand at gates, patrol perimeters, and challenge anyone who approaches: The sentries demanded identification.
The word carries military connotations but extends to any watchful guardian: Security cameras serve as electronic sentries.
Military personnel who fight
- watchmenGuards of property
- gatekeepersThose controlling entry
- lookoutsThose who watch ahead
- protectorsThose who guard others
defenders · patrol · garrison · wardens · custodians · bodyguards · peacekeepers · pickets
Systematic observation of subjects
- patrolRegular surveillance route
- monitoringOngoing observation of something
- reconnaissanceInformation-gathering before action
- inspectionFormal assessment of condition
watch · vigil · rounds · shift · posting · challenge · password · reporting
Elevated structure for surveillance
- battlementsNotched defensive wall top
- palisadeFence of pointed stakes
- stockadeFence of sharpened stakes
- fortressHeavily defended military structure
perimeter · checkpoint · barricade · gatehouse · ramparts · parapet · outpost · frontline
soldiers
Military personnel who fight
- watchmenGuards of property
- gatekeepersThose controlling entry
- lookoutsThose who watch ahead
protectors · defenders · patrol · garrison · wardens · custodians · bodyguards · peacekeepers · pickets
surveillance
Systematic observation of subjects
- patrolRegular surveillance route
- monitoringOngoing observation of something
- reconnaissanceInformation-gathering before action
inspection · watch · vigil · rounds · shift · posting · challenge · password · reporting · alerting
watchtower
Elevated structure for surveillance
- battlementsNotched defensive wall top
- palisadeFence of pointed stakes
- stockadeFence of sharpened stakes
fortress · perimeter · checkpoint · barricade · gatehouse · ramparts · parapet · outpost · frontline · entrance
watchful
Carefully attentive, observant
wary · sharp-eyed · hawk-eyed · keen · focused · prepared · ready · sleepless · unblinking · ever-present
alarm
Urgent warning signal
alert · cry · whistle · horn · intruder · breach · approach · advance · identify · password
- War of 1812War of 1812, Andrew Jackson, Battle of New Orleans, Fort McHenry, Lake Erie
- defensedefense, defending, protecting, protection, security
- securitysecurity guard, security cameras, alarm system, security system, lock
- armed forcesarmy, military, soldiers, troops, marines
- guardsguard, point guard, guardian, shooting guard, bodyguard
- guards and soldiersbodyguards, watchmen, gatekeepers, patrolmen, night watchmen
sentriesintruders
Unauthorized entrants
infiltrators · attackers · raiders · assailants · invaders
sentriesintruders
Unauthorized entrants
infiltrators · trespassers · invaders · spies · saboteurs
sentient, sentinel, sentry, sentience, sentinels, centurion, centurions, sentry-box, sentry-boxes