word | | Nationality |
| adjective | Solomon Islands | noun: Solomon Islander(s) adjective: Solomon Islander |
| adjective | Somalia | noun: Somali(s) adjective: Somali |
| adjective | South Africa | noun: South African(s) adjective: South African |
| adjective | South Sudan | noun: South Sudanese (singular and plural) adjective: South Sudanese |
| adjective | Spain | noun: Spaniard(s) adjective: Spanish |
| adjective | Sri Lanka | noun: Sri Lankan(s) adjective: Sri Lankan |
| adjective | Sudan | noun: Sudanese (singular and plural) adjective: Sudanese |
| adjective | Suriname | noun: Surinamer(s) adjective: Surinamese |
| adjective | Swaziland | noun: Swazi(s) adjective: Swazi |
| adjective | Sweden | noun: Swede(s) adjective: Swedish |
| adjective | Switzerland | noun: Swiss (singular and plural) adjective: Swiss |
| adjective | Syria | noun: Syrian(s) adjective: Syrian |
| adjective | Taiwan | noun: Taiwan (singular and plural) note: example - he or she is from Taiwan; they are from Taiwan adjective: Taiwan |
| adjective | Tajikistan | noun: Tajikistani(s) adjective: Tajikistani |
| adjective | Tanzania | noun: Tanzanian(s) adjective: Tanzanian |
| adjective | Thailand | noun: Thai (singular and plural) adjective: Thai |
| adjective | Timor-Leste | noun: Timorese adjective: Timorese |
| adjective | Togo | noun: Togolese (singular and plural) adjective: Togolese |