Spydomnoun
A group of spies
Espionagenoun
The act or process of learning secret information through clandestine means.
Spydomnoun
(informal) The world of spies and espionage.
Espionagenoun
The practice or employment of spies; the practice of watching the words and conduct of others, to make discoveries, as spies or secret emissaries; secret watching.
Espionagenoun
the systematic use of spies to get military or political secrets
Espionage
Espionage or spying is the act of obtaining secret or confidential information from non-disclosed sources or divulging of the same without the permission of the holder of the information. A person who commits espionage is called an espionage agent or spy.