word | | Terrain |
| mountains | Svalbard | wild, rugged mountains; much of high land ice covered; west coast clear of ice about one-half of the year; fjords along west and north coasts |
| mountains | Swaziland | mostly mountains and hills; some moderately sloping plains |
| mountains | Sweden | mostly flat or gently rolling lowlands; mountains in west |
| mountains | Switzerland | mostly mountains (Alps in south, Jura in northwest) with a central plateau of rolling hills, plains, and large lakes |
| mountains | Syria | primarily semiarid and desert plateau; narrow coastal plain; mountains in west |
| mountains | Taiwan | eastern two-thirds mostly rugged mountains; flat to gently rolling plains in west |
| Mountains | Tajikistan | Pamir and Alay Mountains dominate landscape; western Fergana Valley in north, Kofarnihon and Vakhsh Valleys in southwest |
| mountains | Thailand | central plain; Khorat Plateau in the east; mountains elsewhere |
| mountains | Trinidad and Tobago | mostly plains with some hills and low mountains |
| mountains | Tunisia | mountains in north; hot, dry central plain; semiarid south merges into the Sahara |
| mountains | Turkmenistan | flat-to-rolling sandy desert with dunes rising to mountains in the south; low mountains along border with Iran; borders Caspian Sea in west |
| mountains | Uganda | mostly plateau with rim of mountains |
| mountains | Ukraine | most of Ukraine consists of fertile plains (steppes) and plateaus, mountains being found only in the west (the Carpathians), and in the Crimean Peninsula in the extreme south |
| mountains | United Arab Emirates | flat, barren coastal plain merging into rolling sand dunes of vast desert wasteland; mountains in east |
| mountains | United Kingdom | mostly rugged hills and low mountains; level to rolling plains in east and southeast |
| mountains | United States | vast central plain, mountains in west, hills and low mountains in east; rugged mountains and broad river valleys in Alaska; rugged, volcanic topography in Hawaii |
| mountains | United States Pacific Island Wildlife Refuges | low and nearly level sandy coral islands with narrow fringing reefs that have developed at the top of submerged volcanic mountains, which in most cases rise steeply from the ocean floor |
| Mountains | Venezuela | Andes Mountains and Maracaibo Lowlands in northwest; central plains (llanos); Guiana Highlands in southeast |
| mountains | Western Sahara | mostly low, flat desert with large areas of rocky or sandy surfaces rising to small mountains in south and northeast |
| mountains | Yemen | narrow coastal plain backed by flat-topped hills and rugged mountains; dissected upland desert plains in center slope into the desert interior of the Arabian Peninsula |
| mountains | Zambia | mostly high plateau with some hills and mountains |
| mountains | Zimbabwe | mostly high plateau with higher central plateau (high veld); mountains in east |
| movement | Arctic Ocean | ... three times that thickness; clockwise drift pattern in the Beaufort Gyral Stream, but nearly straight-line movement from the New Siberian Islands (Russia) to Denmark Strait (between Greenland and Iceland); the icepack ... |
| moves | Southern Ocean | ... September, better than a sixfold increase in area; the Antarctic Circumpolar Current (21,000 km in length) moves perpetually eastward; it is the world's largest ocean current, transporting 130 million cubic meters ... |
| Mtkvari | Georgia | ... in the south; Kolkhet'is Dablobi (Kolkhida Lowland) opens to the Black Sea in the west; Mtkvari River Basin in the east; good soils in river valley flood plains, foothills of Kolkhida ... |
| Namib | Namibia | mostly high plateau; Namib Desert along coast; Kalahari Desert in east |
| Nansen | Arctic Ocean | ... landmasses; the ocean floor is about 50% continental shelf (highest percentage of any ocean) with the remainder a central basin interrupted by three submarine ridges (Alpha Cordillera, Nansen Cordillera, and Lomonosov Ridge |