| Tribometer | tribometer |
| Trimeter | trimeter |
| Trimester | trimester term |
| Klinometer | clinometer |
| Picometer | picometer |
| Tachometer | speedometer |
| Aräometer | areometer |
| Ergometer | ergometer |
| Kilometer | kilometer kilometre |
| Pikometer | picometer picometre |
| Rheometer | rheometer |
| Tibeter | Tibetan Five Tibetan Rites |
| Trompeter | trumpeter |
| Trittleiter | step ladder |
| Trichter | funnel |
| Trisomie | trisomy |
| Azetometer | acetimeter |
| Hodometer | odometer |
| Luminometer | photometer |
| Odometer | odometer |