| Singular | Plural | |
|---|---|---|
| Nominativ | conubium, conubiumque, conobium | conubiaque, conubia |
| Genitiv | conubii, conubi | conubiorum |
| Dativ | conubio | conubiis, conubiisque |
| Akkusativ | conubium, conubiumque, conobium | conubia, conubiaque |
| Ablativ | conubio | conubiis, conubiisque |
| Vokativ | conubium, conubiumque, conobium | conubia, conubiaque |