word | | Country name |
| Kingdom | Saudi Arabia | conventional long form: Kingdom of Saudi Arabia conventional short form: Saudi Arabia local long form: Al Mamlakah al Arabiyah as Suudiyah local short form: Al Arabiyah as Suudiyah |
| Kingdom | Spain | conventional long form: Kingdom of Spain conventional short form: Spain local long form: Reino de Espana local short form: Espana |
| Kingdom | Swaziland | conventional long form: Kingdom of Swaziland conventional short form: Swaziland local long form: Umbuso weSwatini local short form: eSwatini |
| Kingdom | Sweden | conventional long form: Kingdom of Sweden conventional short form: Sweden local long form: Konungariket Sverige local short form: Sverige |
| Kingdom | Thailand | conventional long form: Kingdom of Thailand conventional short form: Thailand local long form: Ratcha Anachak Thai local short form: Prathet Thai former: Siam |
| Kingdom | Tonga | conventional long form: Kingdom of Tonga conventional short form: Tonga local long form: Pule'anga Tonga local short form: Tonga former: Friendly Islands |
| Kingdom | United Kingdom | conventional long form: United Kingdom of Great Britain and Northern Ireland; note - Great Britain includes England, Scotland, and Wales conventional short form: United Kingdom abbreviation: UK |
| Kingman | United States Pacific Island Wildlife Refuges | conventional long form: none conventional short form: Baker Island; Howland Island; Jarvis Island; Johnston Atoll; Kingman Reef; Midway Islands; Palmyra Atoll |
| Kinshasa | Congo, Democratic Republic of the | ... Republic of the Congo conventional short form: DRC local long form: Republique Democratique du Congo local short form: RDC former: Congo Free State, Belgian Congo, Congo/Leopoldville, Congo/Kinshasa, Zaire abbreviation: DRC |
| Kirghiz | Kyrgyzstan | conventional long form: Kyrgyz Republic conventional short form: Kyrgyzstan local long form: Kyrgyz Respublikasy local short form: Kyrgyzstan former: Kirghiz Soviet Socialist Republic |
| Kiribati | Kiribati | conventional long form: Republic of Kiribati conventional short form: Kiribati local long form: Republic of Kiribati local short form: Kiribati note: pronounced keer-ree-bahss former: Gilbert Islands |