What is another word for spy?

Need synonyms for spy? Here's a list of similar words from our thesaurus that you can use instead.

Noun
A person employed to secretly obtain information on an enemy or competitor
“The locals feared he was a German spy, and the government forced him to leave.”
Noun
A person who is watching someone, something, or an area
“It would have perhaps have been manned by a spy on the lookout for danger from raiders or angry rebellions.”
Noun
A police officer who looks for evidence as part of solving a crime
Noun
A person who violates their allegiance
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Noun
One who eavesdrops
Noun
A lookout (person who keeps watch)
Noun
Secret agent
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Noun
The act of keeping watch over an area by traveling around it
Verb
To keep a secret watch on someone
“The chips transmit signals and civil liberties groups fear the technology could eventually be used to spy on consumers.”
Verb
To search around, or look out, for something
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“I walked down to the hillock by the roadside that particular Sunday after tea, to admire the view and to spy for possible deer.”
Verb
To notice, especially by careful observation
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“I strongly recommend you pick up the book to read should you spy a copy on someone's bookshelf.”
Verb
To secretly listen in on the conversations of others
“Why spy on their conversation? Or was it an accident? Had he simply been gardening and accidentally overheard them?”
Verb
To work or carry out activities as a spy
“Sights like that were rare, even in his profession, but made putting his life on the line to spy for his country even more worthwhile.”
Verb
To look or stare at someone or something, especially intently
Verb
Look quickly or furtively
Verb
To investigate or meddle in a matter, especially the private affairs of others
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Adjective
Involving secret work within a community or organization, especially for the purposes of police investigation or espionage
momUS
mumUK
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