| Singular | Plural | |
|---|---|---|
| Nominativ | parricidium, parricidiumque | parricidia |
| Genitiv | paricidii, parricidi, parricidii | parricidiorum |
| Dativ | parricidioque, parricidio | parricidiis |
| Akkusativ | parricidium, parricidiumque | parricidia |
| Ablativ | parricidioque, parricidio | parricidiis |
| Vokativ | parricidium, parricidiumque | parricidia |