| Thrashcore | Thrashcore |
| Thrawn | Thrawn |
| Three Cheers for Sweet Revenge | Three Cheers for Sweet Revenge |
| Three Mile Island | Wypadek w elektrowni jądrowej Three Mile Island |
| Three-letter acronym | Skróty trzyliterowe |
| Threshold | Threshold |
| Threshold Limit Value | NDN |
| Threskiornis molucca | Ibis czarnopióry |
| Threskiornithidae | Ibisowate |
| Thrinaxodon | Trinaksodon |
| ThrustSSC | Thrust SSC |
| Thrymr | Thrym |
| Thuban | Thuban |
| Thubten Gyatso | Dalajlama XIII |
| Thug | Thugowie |
| Thug Behram | Thug Behram |
| Thugga | Dugga |
| Thuja occidentalis | Żywotnik zachodni |
| Thule | Thule |
| Thumeries | Thumeries |
| Thun | Thun |
| Thunbergia | Tunbergia |
| Thunderbird | Thunderbird |
| Thunderbirds | Thunderbirds |
| Thunderstick | Thunderstick |
| Thunnus | Tuńczyki |
| Thurii | Turioj |
| Thurmansbang | Thurmansbang |
| Thury | Thury |
| Thusis | Thusis |
| Thutmose I | Totmes I |
| Thutmose II | Totmes II |
| Thutmose III | Totmes III |
| Thutmose IV | Totmes IV |
| THX | THX |
| Thyatira | Akhisar |
| Thyborøn-Harboøre | Gmina Thyborøn-Harboøre |
| Thyholm | Gmina Thyholm |
| Thylacinidae | Wilki workowate |
| Thylacinus cynocephalus | Wilk workowaty |
| Thylacoleo | Lew workowaty |
| Thymallinae | Thymallus |
| Thymus | Macierzanka tymianek |
| Thymus vulgaris | Macierzanka pospolita |
| Thyra | Tyra Danebod |
| Thyratron | Tyratron |
| Thyreophora | Tyreofory |
| Thyrnau | Thyrnau |
| Thysanoptera | Wciornastki |
| Théoden | Théoden |
| Théodore Guérin | Théodore Guérin |
| Théodore-Adrien Sarr | Théodore-Adrien Sarr |
| Théophile Gautier | Théophile Gautier |
| Thérouanne | Thérouanne |
| Théâtre de la comédie italienne | Comédie-Italienne |
| Thônex | Thônex |
| Thüngen | Thüngen |
| Thüringen | Turyngia |
| ti | Pan |
| ti amo | kocham cię |
| ti conosco_ | czy ja cię znam_ |
| ti ho preso | mam cię |
| ti sta bene! | dobrze Ci tak! |
| Ti voglio bene | kocham cię |
| Tia Carrere | Tia Carrere |
| Tia Hellebaut | Tia Hellebaut |
| Tiago Mendes | Tiago Mendes |
| Tiago Monteiro | Tiago Monteiro |
| Tiahuanaco | Tiahuanaco |
| Tiamat | Tiamat |
| tiamina | tiamina |
| Tianjin | Tiencin |
| Tiara papale | Tiara |
| Tiberiade | Tyberiada |
| Tiberino | Tiberinus |
| Tiberio Claudio Cesare Britannico | Brytanik |
| Tiberio Claudio Nerone | Tyberiusz |
| Tiberio Gemello | Tyberiusz Klaudiusz Gemellus |
| Tiberio II Costantino di Bisanzio | Tyberiusz II Konstantyn |
| Tiberio II di Bisanzio | Tyberiusz II Konstantyn |
| Tiberio III di Bisanzio | Tyberiusz III |
| Tiberio Sempronio Gracco | Tyberiusz Grakchus |
| Tibesti | Tibesti |
