The term HOUSE OPENING can be broken down into two crossword solutions: DOOR (4 letters) and PENT (4 letters). A DOOR is an opening in a wall, typically used for entering and exiting a building. It is usually made of wood, metal, or other solid material and is often fitted with a lock. A pent is a type of roof structure that is commonly found in traditional houses. It is a five-sided structure that is supported by posts and has a sloping roof.