The term 'Speeder Stopper' refers to a law enforcement officer who is responsible for stopping drivers who are speeding. The two words that make up this term are 'COP' and 'TROOPER'. 'COP' is an abbreviation for 'Constable On Patrol' and is a 3-letter word. 'TROOPER' is a 7-letter word and is a term used to refer to a state police officer. Together, these two words form the term 'Speeder Stopper', which is used to describe a law enforcement officer who is tasked with stopping drivers who are speeding.