| Singular | Plural | |
|---|---|---|
| Nominativ | contubernium | contubernia |
| Genitiv | contuberni, contubernii | contuberniorum |
| Dativ | contubernio | contuberniis, contuberniisque |
| Akkusativ | contubernium | contubernia |
| Ablativ | contubernio | contuberniis, contuberniisque |
| Vokativ | contubernium | contubernia |