Which word names both a large stiff feather and a porcupine spine?

Complete the nickname of a large long-range German cannon of World War I: "Big ___". A large one has about 80 calories, so what did Cool Hand Luke eat 50 of, for 4,000 calories? Which word names both a large ruminant and idle chatter? What is a large, distinct landmass like India, part of a continent, called? Which large wild sheep of North America has massive curled horns? What is a lariat's shorter name? Which late-1960s TV police drama featured three young undercover cops? A "lavender" was once a woman who did what?