Pottery

"I wonder if your father would notice if I were to dig a hole in the back yard for a raku kiln?" I glanced at my son as we were driving home.  He looked a me with a puzzled expression
   "kill"? 
   "No, kiln.  The 'N' is silent." I smiled. "You don't know what raku means, either, do you?"
   "That depends...are there like five letters in that word that are silent, too?"