Fant 12 synonym til sjeldent jordmetall
| Ord | Ant. ord | Lengde | Bruker | Dato |
|---|---|---|---|---|
| neodym | 1 | 6 | 1 | 2004-02-16 |
| holmium | 1 | 7 | 2 | 2005-02-18 |
| terbium | 1 | 7 | 2 | 2005-02-18 |
| thulium | 1 | 7 | 2 | 2005-02-18 |
| Yttrium | 1 | 7 | 1 | 2004-02-09 |
| europium | 1 | 8 | 2 | 2005-02-18 |
| lutetium | 1 | 8 | 2 | 2005-02-18 |
| samarium | 1 | 8 | 1 | 2004-03-27 |
| praseodym | 1 | 9 | 2 | 2005-02-18 |
| ytterbium | 1 | 9 | 2 | 2005-02-18 |
| dysprosium | 1 | 10 | 2 | 2005-02-18 |
| gadolinium | 1 | 10 | 2 | 2005-02-18 |