Taphole | Definition of Taphole by Merriam-Webster.

Is Taphole a word?

noun Metallurgy. a hole in a blast furnace, steelmaking furnace, etc., through which molten metal or slag is tapped off.

Is Taphouse one word or two?

noun, plural tap·hous·es [tap-hou-ziz]. British. an inn or tavern where liquor for sale is kept on tap.