word | | Terrain |
| Iranian | Iraq | mostly broad plains; reedy marshes along Iranian border in south with large flooded areas; mountains along borders with Iran and Turkey |
| irrigated | Uzbekistan | mostly flat-to-rolling sandy desert with dunes; broad, flat intensely irrigated river valleys along course of Amu Darya, Syr Darya (Sirdaryo), and Zarafshon; Fergana Valley in east surrounded by mountainous Tajikistan ... |
| Island | American Samoa | five volcanic islands with rugged peaks and limited coastal plains, two coral atolls (Rose Island, Swains Island) |
| island | Anguilla | flat and low-lying island of coral and limestone |
| Island | Antarctica | ... include parts of southern Victoria Land, Wilkes Land, the Antarctic Peninsula area, and parts of Ross Island on McMurdo Sound; glaciers form ice shelves along about half of the coastline, and floating ... |
| island | French Southern and Antarctic Lands | Ile Amsterdam (Ile Amsterdam et Ile Saint-Paul): a volcanic island with steep coastal cliffs; the center floor of the volcano is a large plateau Ile Saint-Paul (Ile Amsterdam et Ile ... |
| Island | Heard Island and McDonald Islands | Heard Island - 80% ice-covered, bleak and mountainous, dominated by a large massif (Big Ben) and an active volcano (Mawson Peak); McDonald Islands - small and rocky |
| island | Jan Mayen | volcanic island, partly covered by glaciers |
| island | Montserrat | volcanic island, mostly mountainous, with small coastal lowland |
| island | Palau | varying geologically from the high, mountainous main island of Babelthuap to low, coral islands usually fringed by large barrier reefs |
| island | Saint Helena | ... rises to the east Tristan da 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 ... |
| islands | American Samoa | five volcanic islands with rugged peaks and limited coastal plains, two coral atolls (Rose Island, Swains Island) |