| Singular | Plural | |
|---|---|---|
| Nominativ | certamen, certamenque | certamina |
| Genitiv | certaminis, certaminisque | certaminium, certaminum, certaminumque |
| Dativ | certamine, certamini, mediocertamine | certaminibus, certaminibusque |
| Akkusativ | certamenque, certamen | certamina |
| Ablativ | certamine, mediocertamine | certaminibus, certaminibusque |
| Vokativ | certamenque, certamen | certamina |