Synonyms of infiltrator in English:

infiltrator

noun

  • the constant vigilance needed to outwit enemy infiltrators
    spy, agent, secret agent, undercover agent, operative, plant, intruder, interloper, subversive, informant, informer, mole, entrist, entryist
    informal gatecrasher
    North American informal spook
    archaic intelligencer
  • Definition of infiltrator in:

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    Word of the day retroflex
    Pronunciation: ˈrɛtrə(ʊ)flɛks
    adjective
    turned backwards