word | | Terrain |
| fertile | Norway | glaciated; mostly high plateaus and rugged mountains broken by fertile valleys; small, scattered plains; coastline deeply indented by fjords; arctic tundra in north |
| fertile | Saint Lucia | volcanic and mountainous with some broad, fertile valleys |
| fertile | Serbia | extremely varied; to the north, rich fertile plains; to the east, limestone ranges and basins; to the southeast, ancient mountains and hills |
| fertile | 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 |
| fertile | Uruguay | mostly rolling plains and low hills; fertile coastal lowland |
| fiords | Iceland | mostly plateau interspersed with mountain peaks, icefields; coast deeply indented by bays and fiords |
| five | American Samoa | five volcanic islands with rugged peaks and limited coastal plains, two coral atolls (Rose Island, Swains Island) |
| fjords | Norway | glaciated; mostly high plateaus and rugged mountains broken by fertile valleys; small, scattered plains; coastline deeply indented by fjords; arctic tundra in north |
| fjords | 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 |
| flanked | Gambia, The | flood plain of the Gambia River flanked by some low hills |
| flanks | Saint Helena | ... 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 The Peak ... |
| flat | Anguilla | flat and low-lying island of coral and limestone |
| flat | Argentina | rich plains of the Pampas in northern half, flat to rolling plateau of Patagonia in south, rugged Andes along western border |
| flat | Aruba | flat with a few hills; scant vegetation |