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inside agent

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Synonyms for inside agent

noun person who secretly finds out about another's business
  • agent
  • detective
  • informer
  • investigator
  • mole
  • operative
  • secret agent
  • secret service
  • undercover agent
  • emissary
  • lookout
  • observer
  • patrol
  • picket
  • plant
  • scout
  • sleeper
  • sleuth
  • snoop
  • spook
  • spotter
  • watcher
  • double agent
  • espionage agent
  • foreign agent
  • inside agent
  • intelligencer
Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.