Senegal: noun: Senegalese (singular and plural)
adjective: Senegalese
Seychelles: noun: Seychellois (singular and plural)
adjective: Seychelles
Sierra Leone: noun: Sierra Leonean(s)
adjective: Sierra Leonean
Singapore: noun: Singaporean(s)
adjective: Singapore
Slovakia: noun: Slovak(s)
adjective: Slovak