| M SG | M PL | F SG | F PL | N SG | N PL | |
| NOM | ? (rule) | fortiēs (rule) | ? (rule) | ? (rule) | forte (rule) | fortia (rule) |
| GEN | ? (rule) | ? (rule) | ? (rule) | ? (rule) | ? (rule) | ? (rule) |
| DAT | ? (rule) | ? (rule) | ? (rule) | fortibus (rule) | ? (rule) | fortibus (rule) |
| ACC | fortiem (rule) | ? (rule) | ? (rule) | ? (rule) | forte (rule) | fortia (rule) |
| ABL | fortē (rule) | ? (rule) | ? (rule) | ? (rule) | ? (rule) | fortibus (rule) |
| VOC | ? (rule) | ? (rule) | ? (rule) | ? (rule) | ? (rule) | ? (rule) |