ween cutter and gutter, but not like guitar

Reunion
conventional long form: Department of Reunion
conventional short form: Reunion
local long form: none
local short form: Ile de la Reunion
former: Bourbon Island

Romania
conventional long form: none
conventional short form: Romania
local long form: none
local short form: Romania

Russia
conventional long form: Russian Federation
conventional short form: Russia
local long form: Rossiyskaya Federatsiya
local short form: Rossiya
former: Russian Empire, Russian Soviet Federative Socialist Republic

Rwanda
conventional long form: Rwandese Republic
conventional short form: Rwanda
local long form: Republika y'u Rwanda
local short form: Rwanda
former: Ruanda

Saint Helena
conventional long form: none
conventional short form: Saint Helena

Saint Kitts and Nevis
conventional long form: Federation of Saint
Kitts and Nevis
conventional short form: Saint Kitts and Nevis
former: Federation of Saint Christopher and Nevis

Saint Lucia
conventional long form: none
conventional short form: Saint Lucia

Saint Pierre and Miquelon
conventional long form: Territorial
Collectivity of Saint Pierre and Miquelon
conventional short form: Saint Pierre and Miquelon
local long form: Departement de Saint-Pierre et Miquelon
local short form: Saint-Pierre et Miquelon

Saint Vincent and the Grenadines
conventional long form: none
conventional short form: Saint Vincent and the Grenadines

Samoa
conventional long form: Independent State of Samoa
conventional short form: Samoa
former: Western Samoa

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

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 e Principe

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

Senegal
conventional long form: Republic of Senegal
conventional short form: Senegal
local long form: Republique du Senegal
local short form: Senegal

Serbia and Monten