| Nominativ | congressusque, congressus, congressus | congressusque, congressus, congressuus, congressus, congressuus |
| Genitiv | congressusque, congressus, congressus | congressuum, congressuum |
| Dativ | congressui, congresui, congressui | congressibus, congressibus, congressubus, congressubus |
| Akkusativ | congressum, congressum | congressuus, congressusque, congressus, congressuus, congressus |
| Ablativ | congressu, congressuque, congressu | congressibus, congressibus, congressubus, congressubus |
| Vokativ | congressusque, congressus, congressus | congressuus, congressusque, congressus, congressuus, congressus |
