14 entries under idiom topic. ×

6
undercover work(noun, expression, pursuance, meddling)
0
becoming infected
0
detective work
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find oneself
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get a line
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get hold
0
get wind
0
intelligence activity
0
intelligence operation
0
investigate a crime
0
military espionage
0
police investigation
0
signal detection
0
take notice
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APASmart Define. (2015). spying thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/spying/thesaurus/synonyms
ChicagoSmart Define. 2015. "spying thesaurus" https://smartdefine.org/spying/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2015, spying thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/spying/thesaurus/synonyms>.
MLASmart Define. "spying thesaurus" 14 April 2015. Web. 26 September 2026. <https://smartdefine.org/spying/thesaurus/synonyms>