The term 'GHOST; SPY' can be summarized as two different types of espionage. The first, GHOST, is a type of espionage that involves the use of deception and disguise to infiltrate an enemy's territory or organization. The second, SPOOK, is a five-letter term for a spy or secret agent who works in the shadows to gather information or carry out covert operations. Both types of espionage involve the use of secrecy and subterfuge to achieve their goals.