| Singular | Plural | |
|---|---|---|
| Nominativ | concursus, cocursus, concursusque | concursuus, concursus, cocursus, concursusque |
| Genitiv | concursus, cocursus, concursusque | concursuum |
| Dativ | concursui | concursibus, concursubus |
| Akkusativ | concursumque, concursum | concursuus, concursus, cocursus, concursusque |
| Ablativ | concursuque, concursu | concursubus, concursibus |
| Vokativ | concursus, cocursus, concursusque | concursuus, concursus, cocursus, concursusque |