infiltrator

English Thesaurus

1. an intruder (as troops) with hostile intent (noun.person)

hypernym	:	interloper, intruder, trespasser,
definition	:	someone who intrudes on the privacy or property of another without permission (noun.person)

2. someone who takes up a position surreptitiously for the purpose of espionage (noun.person)

hypernym	:	spy, undercover agent,
definition	:	(military) a secret agent hired by a state to obtain information about its enemies or by a business to obtain industrial secrets from competitors (noun.person)

3. an intruder (as troops) with hostile intent (noun.person)

derivation	:	infiltrate, pass through,
definition	:	pass through an enemy line; in a military conflict (verb.motion)

4. someone who takes up a position surreptitiously for the purpose of espionage (noun.person)

derivation	:	infiltrate, penetrate,
definition	:	enter a group or organization in order to spy on the members (verb.social)

5. an intruder (as troops) with hostile intent (noun.person)

derivation	:	infiltrate, pass through,
definition	:	pass through an enemy line; in a military conflict (verb.motion)

6. someone who takes up a position surreptitiously for the purpose of espionage (noun.person)

derivation	:	infiltrate, penetrate,
definition	:	enter a group or organization in order to spy on the members (verb.social)