| Priabonium | Priabonian |
| Brimborium | fuss to-do |
| Aeronium | Aeronian |
| Patrimonium | patrimony |
| Titonium | Tithonian |
| Nihonium | nihonium |
| Pandämonium | pandemonium |
| Plutonium | plutonium |
| Polonium | polonium |
| Positronium | positronium |
| Zirkonium | zirconium |
| Frasnium | Frasnian |
| Cranium | cranium |
| Kranium | skull cranium |
| Triennium | triennium |
| Oratorium | oratory |
| Paibium | Paibian |
| Piacenzium | Piacenzian |
| Pragium | Pragian |
| Präputium | foreskin |