word | | Country name |
| Oman | United Arab Emirates | conventional long form: United Arab Emirates conventional short form: none local long form: Al Imarat al Arabiyah al Muttahidah local short form: none former: Trucial Oman, Trucial States abbreviation: UAE |
| Oriental | Uruguay | conventional long form: Oriental Republic of Uruguay conventional short form: Uruguay local long form: Republica Oriental del Uruguay local short form: Uruguay former: Banda Oriental, Cisplatine Province |
| Outer | Mongolia | conventional long form: none conventional short form: Mongolia local long form: none local short form: Mongol Uls former: Outer Mongolia |
| outre | French Polynesia | ... form: Overseas Lands of French Polynesia conventional short form: French Polynesia local long form: Pays d'outre-mer de la Polynesie Francaise local short form: Polynesie Francaise former: French Colony of Oceania |
| outre | Saint Barthelemy | conventional long form: Overseas Collectivity of Saint Barthelemy conventional short form: Saint Barthelemy local long form: Collectivite d'outre mer de Saint-Barthelemy local short form: Saint-Barthelemy |
| outre | Saint Martin | conventional long form: Overseas Collectivity of Saint Martin conventional short form: Saint Martin local long form: Collectivity d'outre mer de Saint-Martin local short form: Saint-Martin |
| Overseas | French Polynesia | conventional long form: Overseas Lands of French Polynesia conventional short form: French Polynesia local long form: Pays d'outre-mer de la Polynesie Francaise local short form: Polynesie Francaise former: French Colony ... |
| Overseas | Saint Barthelemy | conventional long form: Overseas Collectivity of Saint Barthelemy conventional short form: Saint Barthelemy local long form: Collectivite d'outre mer de Saint-Barthelemy local short form: Saint-Barthelemy |
| Overseas | Saint Martin | conventional long form: Overseas Collectivity of Saint Martin conventional short form: Saint Martin local long form: Collectivity d'outre mer de Saint-Martin local short form: Saint-Martin |
| Ozbekiston | Uzbekistan | conventional long form: Republic of Uzbekistan conventional short form: Uzbekistan local long form: Ozbekiston Respublikasi local short form: Ozbekiston former: Uzbek Soviet Socialist Republic |
| Pacific | Marshall Islands | ... Marshall Islands conventional short form: Marshall Islands local long form: Republic of the Marshall Islands local short form: Marshall Islands abbreviation: RMI former: Trust Territory of the Pacific Islands, Marshall Islands District |
| Pacific | Micronesia, Federated States of | ... States of Micronesia conventional short form: none local long form: Federated States of Micronesia local short form: none former: Trust Territory of the Pacific Islands, Ponape, Truk, and Yap Districts abbreviation: FSM |
| Pacific | Northern Mariana Islands | conventional long form: Commonwealth of the Northern Mariana Islands conventional short form: Northern Mariana Islands abbreviation: CNMI former: Trust Territory of the Pacific Islands, Mariana Islands District |
| Pacific | Palau | conventional long form: Republic of Palau conventional short form: Palau local long form: Beluu er a Belau local short form: Belau former: Trust Territory of the Pacific Islands, Palau District |
| Pakistan | Bangladesh | conventional long form: People's Republic of Bangladesh conventional short form: Bangladesh local long form: Gana Prajatantri Banladesh local short form: Banladesh former: East Bengal, East Pakistan |
| Pakistan | Pakistan | conventional long form: Islamic Republic of Pakistan conventional short form: Pakistan local long form: Jamhuryat Islami Pakistan local short form: Pakistan former: West Pakistan |
| Palau | Palau | conventional long form: Republic of Palau conventional short form: Palau local long form: Beluu er a Belau local short form: Belau former: Trust Territory of the Pacific Islands, Palau District |
| Palmyra | 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 |
| Panama | Panama | conventional long form: Republic of Panama conventional short form: Panama local long form: Republica de Panama local short form: Panama |
| Papua | Papua New Guinea | conventional long form: Independent State of Papua New Guinea conventional short form: Papua New Guinea local short form: Papuaniugini former: Territory of Papua and New Guinea abbreviation: PNG |