Tunisia
noun: Tunisian(s)
adjective: Tunisian
Turkey
noun: Turk(s)
adjective: Turkish
Turkmenistan
noun: Turkmen(s)
adjective: Turkmen
Turks and Caicos Islands
noun: none
adjective: none
Tuvalu
noun: Tuvaluan(s)
adjective: Tuvaluan
Uganda
noun: Ugandan(s)
adjective: Ugandan
Ukraine
noun: Ukrainian(s)
adjective: Ukrainian
United Arab Emirates
noun: Emirati(s)
adjective: Emirati
United Kingdom
noun: Briton(s), British (collective plural)
adjective: British
United States
noun: American(s)
adjective: American