打ち撒ける[buchimakeru] to throw out (everything)
打つかる[butsukaru] to strike against
打っ付ける[uchitsukeru] to knock
安打[anda] safe hit (baseball)
１打[ichida] stroke

一打ち[hitouchi] stroke
一網打尽[ichimoudajin] (a) big haul
殴打[ouda] hit
火打石[suiseki] flint

鍵を掛ける[kagiwokakeru] to lock
鍵穴[kagiana] keyhole
鍵盤[kenban] keyboard (e.g. piano, computer)
黒鍵[kokken] black keys
打鍵[daken] keystroke

合鍵[aikagi] duplicate key
鍵っ子[kagikko] latchkey child
鍵束[kagitaba] bunch of keys
関鍵[kanken] locking doors