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 neoteny
    Pronunciation: niːˈɒt(ə)ni
    noun
    retention of juvenile features in the adult animal