word | | Terrain |
| deepest | Pacific Ocean | ... ocean floor in the eastern Pacific is dominated by the East Pacific Rise, while the western Pacific is dissected by deep trenches, including the Mariana Trench, which is the world's deepest |
| deeply | Iceland | mostly plateau interspersed with mountain peaks, icefields; coast deeply indented by bays and fiords |
| deeply | Norway | glaciated; mostly high plateaus and rugged mountains broken by fertile valleys; small, scattered plains; coastline deeply indented by fjords; arctic tundra in north |
| deeply | Saint Helena | ... Cunha: sheer cliffs line the coastline of the nearly circular island; the flanks of the central volcanic peak are deeply dissected; narrow coastal plain lies between The Peak and the coastal cliffs |
| delta | Egypt | vast desert plateau interrupted by Nile valley and delta |
| delta | Vietnam | low, flat delta in south and north; central highlands; hilly, mountainous in far north and northwest |
| deltas | China | mostly mountains, high plateaus, deserts in west; plains, deltas, and hills in east |
| Denmark | Arctic Ocean | ... the Beaufort Gyral Stream, but nearly straight-line movement from the New Siberian Islands (Russia) to Denmark Strait (between Greenland and Iceland); the icepack is surrounded by open seas during the summer ... |
| Denmark | Atlantic Ocean | surface usually covered with sea ice in Labrador Sea, Denmark Strait, and coastal portions of the Baltic Sea from October to June; clockwise warm-water gyre (broad, circular system of currents) in ... |
| depressions | Bermuda | low hills separated by fertile depressions |
| depressions | Libya | mostly barren, flat to undulating plains, plateaus, depressions |
| depth | World | the greatest ocean depth is the Mariana Trench at 10,924 m in the Pacific Ocean |
| depths | Southern Ocean | ... shallow water; the Antarctic continental shelf is generally narrow and unusually deep, its edge lying at depths of 400 to 800 m (the global mean is 133 m); the Antarctic icepack grows ... |