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