| Singular | Plural | |
|---|---|---|
| Nominativ | onus, contionus, onusque, lingonus, onussignis, mansionus, polonus, testimonus, assensionus | oneraque, onera |
| Genitiv | oneris | onerium, onerum |
| Dativ | onere, oneri, occasionere, onerique | oneribus |
| Akkusativ | assensionus, onus, contionus, onusque, lingonus, onussignis, mansionus, polonus, testimonus | oneraque, onera |
| Ablativ | onere, occasionere | oneribus |
| Vokativ | assensionus, onus, contionus, onusque, lingonus, onussignis, mansionus, polonus, testimonus | oneraque, onera |