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Spy
noun – A person who tries secretly to obtain information for one country in the territory of another usually unfriendly country.
Usage example: the government spy risked his life every day in the fight against global terrorism
Infiltrator is a synonym for
spy in
person topic. You can use "Infiltrator" instead a
noun "Spy", if it concerns topics such as
informer,
stool pigeon.
Nearby Word:
spying