What do you call a substance that speeds up a chemical reaction without being used up?

Which Shakespeare comedy has a title about subduing a small mammal? A submarine built by John P. Holland, the "Fenian Ram", is displayed at the Paterson Museum in which state? What do a subpoena, a tennis ball and dinner have in common? AMR Corporation was the parent company of which airline? Complete the name of the Maryland suburb of Washington, D.C.: "___ Spring". Which city borders Providence and is one of Rhode Island's largest cities? A subway platform under State Street in which city's Loop is about 3,500 feet long? Brewer Matthew Vassar opened his namesake college for women in 1861 in which New York city?