word | | Country name |
| Saint | Saint Vincent and the Grenadines | conventional long form: none conventional short form: Saint Vincent and the Grenadines |
| Sak | Georgia | conventional long form: none conventional short form: Georgia local long form: none local short form: Sak'art'velo former: Georgian Soviet Socialist Republic |
| Saltanat | Oman | conventional long form: Sultanate of Oman conventional short form: Oman local long form: Saltanat Uman local short form: Uman former: Muscat and Oman |
| Salvador | El Salvador | conventional long form: Republic of El Salvador conventional short form: El Salvador local long form: Republica de El Salvador local short form: El Salvador |
| Samajaya | Sri Lanka | ... Socialist Republic of Sri Lanka conventional short form: Sri Lanka local long form: Shri Lamka Prajatantrika Samajaya di Janarajaya/Ilankai Jananayaka Choshalichak Kutiyarachu local short form: Shri Lamka/Ilankai former: Serendib, Ceylon |
| Samoa | American Samoa | conventional long form: Territory of American Samoa conventional short form: American Samoa abbreviation: AS |
| Samoa | Samoa | conventional long form: Independent State of Samoa conventional short form: Samoa local long form: Malo Sa'oloto Tuto'atasi o Samoa local short form: Samoa former: Western Samoa |
| San | San Marino | conventional long form: Republic of San Marino conventional short form: San Marino local long form: Repubblica di San Marino local short form: San Marino |
| Sanaa | Yemen | ... long form: Al Jumhuriyah al Yamaniyah local short form: Al Yaman former: Yemen Arab Republic [Yemen (Sanaa) or North Yemen] and People's Democratic Republic of Yemen [Yemen (Aden) or South Yemen |
| Sandwich | South Georgia and the South Sandwich Islands | conventional long form: South Georgia and the South Sandwich Islands conventional short form: none abbreviation: SGSSI |
| Sanghiya | Nepal | conventional long form: Federal Democratic Republic of Nepal conventional short form: Nepal local long form: Sanghiya Loktantrik Ganatantra Nepal local short form: Nepal |
| Santa | Holy See (Vatican City) | ... Holy See (State of the Vatican City) conventional short form: Holy See (Vatican City) local long form: Santa Sede (Stato della Citta del Vaticano) local short form: Santa Sede (Citta del Vaticano |
| Sao | Sao Tome and Principe | conventional long form: Democratic Republic of Sao Tome and Principe conventional short form: Sao Tome and Principe local long form: Republica Democratica de Sao Tome e Principe local short form: Sao Tome ... |
| Sathalanalat | Laos | conventional long form: Lao People's Democratic Republic conventional short form: Laos local long form: Sathalanalat Paxathipatai Paxaxon Lao local short form: none |
| Saudi | 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 |
| Savage | Niue | conventional long form: none conventional short form: Niue note: pronounciation falls between nyu-way and new-way, but not like new-wee former: Savage Island |
| Schweiz | Switzerland | ... Swiss Confederation conventional short form: Switzerland local long form: Schweizerische Eidgenossenschaft (German); Confederation Suisse (French); Confederazione Svizzera (Italian); Confederaziun Svizra (Romansh) local short form: Schweiz (German); Suisse (French); Svizzera (Italian); Svizra (Romansh |
| Schweizerische | Switzerland | conventional long form: Swiss Confederation conventional short form: Switzerland local long form: Schweizerische Eidgenossenschaft (German); Confederation Suisse (French); Confederazione Svizzera (Italian); Confederaziun Svizra (Romansh) local short form: Schweiz (German); Suisse (French); Svizzera ... |
| Scotland | 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 |
| Sea | Coral Sea Islands | conventional long form: Coral Sea Islands Territory conventional short form: Coral Sea Islands |
| Sede | Holy See (Vatican City) | ... Holy See (State of the Vatican City) conventional short form: Holy See (Vatican City) local long form: Santa Sede (Stato della Citta del Vaticano) local short form: Santa Sede (Citta del Vaticano |