secret agent

from WordNet (r) 3.0 (2006)

secret agent
    n 1: a person secretly employed in espionage for a government
         [syn: {secret agent}, {intelligence officer}, {intelligence
         agent}, {operative}]

from Moby Thesaurus II by Grady Ward, 1.0

41 Moby Thesaurus words for "secret agent":
      CIA man, asker, catechist, cloak-and-dagger operative,
      counterintelligence agent, counterspy, cross-interrogator,
      cross-questioner, detective, double agent, espionage agent,
      examiner, inquirer, inquisitionist, inquisitor, inside man,
      intelligence agent, interlocutor, interpellator, interrogator,
      interrogatrix, interviewer, military-intelligence man,
      naval-intelligence man, operative, opinion-sampler, poller,
      pollster, prober, querier, querist, questioner, questionist,
      quizzer, reconnoiterer, sampler, scout, spotter, spy, spy-catcher,
      undercover man