拍手を打つ[kashiwadewoutsu] to clap one's hands in prayer
口拍子[kuchibyoushi] counting time orally
三拍子[sanbyoushi] triple time (music)
手拍子[tebyoushi] beating time
心拍[shinpaku] heart rate

二拍子[nibyoushi] duple meter
拍子木[hyoushigi] wooden clappers
拍車[hakusha] (riding) spur
拍車をかける[hakushawokakeru] to spur (on)
拍手[hakushu] clapping hands