colluder

/kəˈluːdər/
noun
  1. A person who secretly cooperates with others to do something dishonest or illegal.
    • The investigation revealed that each colluder had a specific role in the fraud.
    • The whistleblower identified every colluder involved in the bribery scandal.
    • As a colluder in the price-fixing scheme, he faced heavy fines.
Antonyms
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