| Singular | Plural | |
|---|---|---|
| Nominativ | duricordia | duricordiae |
| Genitiv | duricordiae, duricordiai | duricordiarum, duricordium |
| Dativ | duricordiae, duricordiai | duricordiis, duricordiabus |
| Akkusativ | duricordiam | duricordias |
| Ablativ | duricordia, duricordiad | duricordiis, duricordiabus |
| Vokativ | duricordia | duricordiae |