| Terrarium | terrarium |
| Herbarium | herbarium |
| Terbium | terbium |
| Terrain | terrain |
| Territorium | territory |
| Terrorist | terrorist |
| Erratum | erratum |
| Tepidarium | hothouse |
| Nektarium | floral nectary honey leaf nectary |
| Germanium | germanium |
| Iterativum | frequentative |
| Terramare | terramare |
| Terraner | Earthling |
| Terranerin | Earthling |
| Terrorcamp | terrorist camp |
| Deuterium | deuterium |
| Terrasse | terrace patio |
| Terrier | terrier |
| Terrine | tureen soup tureen terrine |
| Terror | terror |