Rwanda
noun: Rwandan(s)
adjective: Rwandan
Saint Helena
noun: Saint Helenian(s)
adjective: Saint Helenian
Saint Kitts and Nevis
noun: Kittitian(s), Nevisian(s)
adjective: Kittitian, Nevisian
Saint Lucia
noun: Saint Lucian(s)
adjective: Saint Lucian
Saint Pierre and Miquelon
noun: Frenchman(men), Frenchwoman(women)
adjective: French
Saint Vincent and the Grenadines
noun: Saint Vincentian(s) or
Vincentian(s)
adjective: Saint Vincentian or Vincentian
Samoa
noun: Samoan(s)
adjective: Samoan
San Marino
noun: Sammarinese (singular and plural)
adjective: Sammarinese
Sao Tome and Principe
noun: Sao Tomean(s)
adjective: Sao Tomean
Saudi Arabia
noun: Saudi(s)
adjective: Saudi or Saudi Arabian