| Röntgenium | roentgenium |
| Roentgenium | roentgenium |
| Röntgen | X-ray |
| röntgen | X-ray |
| Röntgenbild | radiograph X-ray |
| Oxygenium | oxygen |
| ringen um | contend |
| Ingenium | angel |
| Ruthenium | ruthenium |
| Drontheim | Trondheim |
| Röntgenblick | X-ray vision |
| Ontogenie | ontogeny |
| Kontinuum | continuum |
| kongenial | congenial |
| Rhenium | rhenium |
| Fortunium | Fortunian |
| Santonium | Santonian |
| Tortonium | Tortonian |
| Aeronium | Aeronian |
| Front-End | front end |