Spy and Whistle-blower

Spy noun – A person who tries secretly to obtain information for one country in the territory of another usually unfriendly country.

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Whistle-blower and spy are semantically related In some cases you can use "Whistle-blower" instead a noun "Spy".

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Nearby Word: spying

Whistle-blower noun – A person who provides information about another's wrongdoing.

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Spy and whistle-blower are semantically related in traitor topic. You can use "Spy" instead a noun phrase "Whistle-blower", if it concerns topics such as person who is disloyal, informer to police.