infiltrators
Enemies within walls
Infiltrators are people who gain access to a place or organization secretly, often with hostile intent.
Spies infiltrate enemy governments; undercover agents infiltrate criminal organizations.
The word implies deception—infiltrators pose as members while serving outside interests: Police infiltrators attended the protest meetings.
In military contexts, infiltrators are soldiers who slip behind enemy lines.
Secret intelligence gatherers
- molesBurrowing insectivore mammals
- agentsThose who act for others
- operativesThose who execute missions
- intelligenceMental ability, cognitive capacity
counterintelligence · sleeper · covert · handlers · defectors · surveillance · classified · turncoat
Elite assault troops
- saboteursIntentional disruptors of operations
- guerrillasIrregular combatants, unconventional warfare
- scoutsInformation gatherers ahead
- reconnaissanceInformation-gathering before action
raiders · operatives · insertion · ambush · paratrooper · clandestine · breach · perimeter
People providing secret intelligence
- plantsPhotosynthesizing rooted organisms
- whistleblowersThose exposing organizational misconduct
- insidersThose with special access
- undercoverSecretly engaged in espionage
embedded · surveillance · exposure · leaked · confidential · compromised · mole · betrayal
Unauthorized computer system intruders
- malwareHarmful computer programs
- backdoorHidden bypass mechanism
- breachBreaking of agreement
- phishingFraudulent credential harvesting
rootkit · exploit · firewall · network · intrusion · unauthorized · RAT · botnet
Disease-causing microorganisms
- contaminantsUnwelcome substances in something pure
- invasiveEncroaching without welcome
- toxinsHarmful biological substances
- parasitesOrganisms feeding off hosts
allergens · bacteria · viruses · membrane · barrier · infection · penetration · bloodstream
spies
Secret intelligence gatherers
- molesBurrowing insectivore mammals
- agentsThose who act for others
- operativesThose who execute missions
intelligence · counterintelligence · sleeper · covert · handlers · defectors · surveillance · classified · turncoat · tradecraft
commandos
Elite assault troops
- saboteursIntentional disruptors of operations
- guerrillasIrregular combatants, unconventional warfare
- scoutsInformation gatherers ahead
reconnaissance · raiders · operatives · insertion · ambush · paratrooper · clandestine · breach · perimeter · incursion
informants
People providing secret intelligence
- plantsPhotosynthesizing rooted organisms
- whistleblowersThose exposing organizational misconduct
- insidersThose with special access
undercover · embedded · surveillance · exposure · leaked · confidential · compromised · mole · betrayal · trusted
hackers
Unauthorized computer system intruders
phishing · rootkit · exploit · firewall · network · intrusion · unauthorized · RAT · botnet · payload
pathogens
Disease-causing microorganisms
- contaminantsUnwelcome substances in something pure
- invasiveEncroaching without welcome
- toxinsHarmful biological substances
parasites · allergens · bacteria · viruses · membrane · barrier · infection · penetration · bloodstream · cells
- espionagespy, spies, double agent, double agents, spying
- unwelcome peopleintruders, trespassers, invaders, uninvited guests, gatecrashers
- Elite Unitsspecial forces, commandos, Navy SEALs, Delta Force, Green Berets
- enemiesenemy, foe, foes, adversary, nemesis
- military scoutsscouts, ranger, vanguard, pathfinder, reconnaissance
- secret organizationscabal, secret society, secret societies, conspiracy, spy network
infiltratorsinvited guests
Those formally requested present
authorized personnel · guests of honor · founding members · invitees · honored guests
infiltratorsguards
Protectors or watchmen
sentries · gatekeepers · defenders · border guards · watchmen