The term SPADE, FOR ONE can refer to three different job descriptions: SAM (3 letters), DETECTIVE (9 letters), and PRIVATEEYE (10 letters). Sam is a shortened version of the word 'DETECTIVE' and is often used to refer to a private investigator. DETECTIVE is a law enforcement officer who investigates crimes and gathers evidence. Privateeye is another term for a private investigator, who is hired to investigate matters for a private citizen or business.