| plain | area of level land, usually at low elevation and often covered with grasses |
| plateau | area of flat or rolling land at a high elevation,about 300-3000 feet high |
| prime meridian | line of the global grid running from the north pole to the south pole through greenwich, england; starting point for measuring degrees of east and west longitude |
| relief | changes in elevation over a given area of land |
| river | large natural steam of water that runs through the land |