List of Common Nouns: Structures

1. ceiling The inner upper surface of a room that is the surface, usually flat, on which one look above.last updated 1/5/2016
   https://en.wikipedia.org/wiki/Ceiling last updated 1/5/2016
2. floor The inner lower surface of a room that is the surface, usually flat, on which one walks and stands.last updated 1/4/2016
   https://en.wikipedia.org/wiki/Floor last updated 1/4/2016
3. window An opening in the wall or roof of a building that is usually fitted with glass in a frame to admit light or air, or allow people to see through.last updated 1/4/2016
   https://en.wikipedia.org/wiki/Window last updated 1/4/2016