Thesaurus
undercover
noun
Synonyms and Antonyms of UNDERCOVER
a person who tries secretly to obtain information for one country in the territory of another usually unfriendly country <within the city was a well-organized fifth column, and these undercovers would make themselves known as soon as the invading forces breached the city limits>
Related Words courier; counterspy, double agent, sleeper; infiltrator, informer, stool pigeon; spymaster, superspy
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