Which overpowering fear gives its name to a fortified room for hiding from intruders, and to a 2002 Jodie Foster film?

Complete the proverb: "An ounce of prevention is worth a ___ of cure." An overdose killed which controversial stand-up comic in Hollywood in 1966? An overdose of alcohol helped kill which Welsh poet on November 9, 1953? Which star died of a barbiturate overdose at her Los Angeles home in August 1962? An oxide of which light metal, discovered in 1791, is widely used as a white pigment? In SST, the term for jets like the Concorde, what does "SS" stand for? Which event, occurring underwater, is the most common cause of tsunamis? An underwater tunnel connecting Detroit with which Canadian city opened on November 3, 1930?