| Keyword | Type | See | See also | Notes | 
|---|---|---|---|---|
| Trust | Keyword | |||
| Truth | Keyword | |||
| Truthfulness and falsehood | Keyword | |||
| Trypanosoma brucei | Keyword | |||
| Trypanosoma cruzi | Keyword | |||
| Trypanosomiasis | Keyword | |||
| Trzciniec culture | Keyword | |||
| Tsachila | Ethnic group | Colorado Indians | ||
| Tsarevets castle | Keyword | Dvorets Tsarevets site | ||
| Tschagatai language | Keyword | Chagatai language | ||
| Tschagga language | Keyword | Chaga language | ||
| Tscokwe | Ethnic group | Chokwe | ||
| Tseltal | Ethnic group | Tzeltal | ||
| Tsetse flies | Keyword | |||
| Tshaahui | Ethnic group | Chayahuita | ||
| Tshokossi | Ethnic group | Chokossi | ||
| Tsimane | Ethnic group | Chimane | ||
| Tsimihety | Ethnic group | |||
| Tsimshian | Ethnic group | |||
| Tsimshian languages | Keyword | |||
| Tsoneca | Ethnic group | Tehuelche | ||
| Tsonga | Ethnic group | |||
| Tsonik | Ethnic group | Tehuelche | ||
| Tsou | Ethnic group | |||
| Tswana | Ethnic group | |||
| Tswana language | Keyword | |||
| Tswapong | Ethnic group | |||
| Tujen | Ethnic group | Monguor | ||
| Tu | Ethnic group | Monguor | ||
| Tuamotu Islands | Place | French Polynesia | ||
| Tuareg | Ethnic group | |||
| Tubalar | Ethnic group | |||
| Tubatulabal language | Keyword | |||
| Tuberculosis | Keyword | |||
| Tubu | Ethnic group | Teda | ||
| Tubuai Islands | Place | Austral Islands | ||
| Tucano | Ethnic group | |||
| Tucano | Language | |||
| Tucanoan Indians | Ethnic group | |||
| Tucanoan languages | Keyword | |||
| Tucuman | Place | |||
| Tucuna | Ethnic group | |||
| Tucuna language | Keyword | |||
| Tuelche | Ethnic group | Tehuelche | ||
| Tujen | Ethnic group | Monguor | ||
| Tujia | Ethnic group | |||
| Tukano | Ethnic group | Tucano | ||
| Tukanoa | Ethnic group | Tucano | ||
| Tukuna | Ethnic group | Tucuna | ||
| Tula Oblast | Place | Russian Federation |