| Singular | Plural | |
|---|---|---|
| Nominativ | colocyntha | colocynthae |
| Genitiv | colocynthai, colocynthae | colocyntharum, colocynthum |
| Dativ | colocynthai, colocynthae | colocynthis, colocynthabus |
| Akkusativ | colocyntham | colocynthas |
| Ablativ | colocyntha, colocynthad | colocynthis, colocynthabus |
| Vokativ | colocyntha | colocynthae |