| Ossarium | ossuary |
| Ossuarium | ossuary |
| Rosarium | rosary |
| Ovarium | ovary |
| ossär | bony osseous |
| Vivarium | vivarium |
| -arium | -arium |
| Apiarium | apiary beeyard |
| Aquarium | aquarium tank |
| Aviarium | aviary |
| Barium | barium |
| Samarium | samarium |
| Solarium | sunbed tanning bed |
| Asselium | Asselian |
| Osmium | osmium |
| Stadium | stage |
| Ossetien | Ossetia |
| Ossi | easterner East German |
| Rossarzt | hippiater |
| Großraum | neighborhood |