arch - a curved structure over an opening, beam - a long, sturdy piece of wood or metal spanning an opening or part of a building, column - an upright pillar supporting the building structure above, door - a large hinged piece of wood, metal, or glass at the entrance to a building or room, elevator - a rounded vault forming the roof of a building with a circular base, roof - an enclosed platform in a shaft for raising or lowering people to different floors of a building, house - a building where people live, pyramid - a large tomb built with a square based and four triangular sides meeting at a point, skyscraper - a very tall building with many stories, stairs - a set of steps leading from one floor of a building to another, window - an opening in the wall of a building, typically framed with glass to let people see out,

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