Newbie needs help with terminology

Hi all! New here from Ohio. I have a crazy idea and have no idea what search terms to use to find more info: I'm interested in building some type of oven by partially excavating into a hillside and maybe building a roof of sheet steel with brick on top. Bonus if I could figure out a way for it to double as a pottery kiln. Any ideas what such a thing might be called? I'm sure someone has conceived of this before but can't find sources myself. Thanks for any ideas!