Which four-letter word is often used for a small pigeon?

Which verb means to abandon your country and transfer your allegiance to another nation? Which 2005 Broadway smash follows four blue-collar guys from the streets of Newark to pop stardom as the Four Seasons? Dutch builders in Leeuwarden set a 2006 world record by toppling more than 4 million of which items? In ancient Egyptian measurement, 4 digits (finger widths) made a palm. What did 5 digits make? Which four-letter word is the usual antonym of "domesticated" when describing animals? Which Andrew Lloyd Webber musical, based on poems by T.S. Eliot, is about creatures said to have nine lives? What is the American name for the sleeveless garment the British call a waistcoat? On the Beaufort scale, which four-letter term describes a wind speed of less than 1 mph?