espionageThe act or practice of spying or of using spies
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The practice of spying or of using spies, typically by governments to obtain political and military information"His career in espionage lasted over thirty years."
conspiracyA secret plan made by two or more people to do something that is harmful or illegal
Definitions:
A secret plan by a group to do something unlawful or harmful"They were charged with conspiracy to commit murder."
adventureAn exciting or very unusual experience
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An unusual and exciting, typically hazardous, experience or activity"They embarked on an adventure to find the missing treasure."
intrigueThe secret planning of something illicit or detrimental
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The secret planning of something illicit or detrimental to someone"He was fascinated by the intrigue and scandal in the royal court."
allianceAn agreement between two or more parties, made in order to advance common goals and to secure common interests
Definitions:
A union or association formed for mutual benefit, especially between countries or organisations"Several nations formed an alliance to combat the threat of terrorism."