3
reconnaissance
1
SIGINT
1
clandestine operation
1
combat intelligence
1
counterintelligence
1
current intelligence
1
overt operation
1
reconnaissance mission
1
signals intelligence
1
spying
1
strategic intelligence
1
tactical intelligence
1
undercover work
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APASmart Define. (2013). intelligence activity thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/intelligence_activity/thesaurus/narrower
ChicagoSmart Define. 2013. "intelligence activity thesaurus" https://smartdefine.org/intelligence_activity/thesaurus/narrower (accessed September 20, 2026).
HarvardSmart Define 2013, intelligence activity thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/intelligence_activity/thesaurus/narrower>.
MLASmart Define. "intelligence activity thesaurus" 18 May 2013. Web. 20 September 2026. <https://smartdefine.org/intelligence_activity/thesaurus/narrower>