| Singular | Plural | |
|---|---|---|
| Nominativ | catabasis | catabases, catabasis |
| Genitiv | catabasis | catabasium, catabasum |
| Dativ | catabasi, catabase | catabasibus |
| Akkusativ | catabasem, catabasim | catabases, catabasis, catabaseis |
| Ablativ | catabasi, catabase | catabasibus |
| Vokativ | catabasis | catabases |