| Transgression | transgression |
| Transgressiv | transgressive |
| Transgressivus | transgressive |
| Transmission | transmission |
| Trans-Person | transgender |
| Transfektion | transfection |
| Transklusion | transclusion |
| Transfusion | transfusion |
| Transkription | transcription |
| Progression | chord progression |
| Aggression | aggression |
| Regression | regression marine regression |
| Transferrin | transferrin |
| Transaktion | transaction |
| Transformation | transformation |
| Transition | transition |
| Translation | translation |
| Translokation | translocation |
| Transposition | transposition |
| Transvestit | transvestite |