| Singular | Plural | |
|---|---|---|
| Nominativ | contubernalis | contubernales |
| Genitiv | contubernalis | contubernalium, contubernalum |
| Dativ | contubernale, contubernali | contubernalibus |
| Akkusativ | contubernalem, contubernalim | contubernalis, contubernaleis, contubernales |
| Ablativ | contubernale, contubernali | contubernalibus |
| Vokativ | contubernalis | contubernales |