| Unbiennium | unbiennium |
| Unbipentium | unbipentium |
| Unbiunium | unbiunium |
| Unnilennium | unnilennium |
| Ununennium | ununennium |
| Unbibium | unbibium |
| Unbihexium | unbihexium |
| Unbinilium | unbinilium |
| Unbioctium | unbioctium |
| Unbiseptium | unbiseptium |
| Unbitrium | unbitrium |
| Triennium | triennium |
| Unnilunium | unnilunium |
| Unbiquadium | unbiquadium |
| Ununbium | ununbium |
| unbrennbar | incombustible |
| Famennium | Famennian |
| Dezennium | decennium |
| Millennium | millennium |
| Quinquennium | five-year period lustrum quinquennium |