| Nominativ | improbabilis, improbabiles, improbum, improbabilibus, improbalitas, improbus, imbrobus, improba | improba, improbabilis, improbi, improbabiles, improbae, improbiter, imbrobi, improbiorem, improbiusque, improbabilibus, improbalitas |
| Genitiv | improbi, improbi, improbae, improbiter, improbiter, imbrobi, improbiorem, imbrobi, improbiorem, improbiusque, improbiusque | improbarum, improborum, improborum |
| Dativ | improbo, improbae, improbo | improbissimae, improbissimos, improbissimam, improbissimum, improbissimas, improbissimus, improbissime, improbissimi, improbissimis, improbis, improbissimo, improbissima, improbissimorum |
| Akkusativ | improbam, improbum, improbum | improbas, improba, improbos, improbabilis, improbossime, improbossus, improbabiles, imbrobos, improbabilibus, improbalitas |
| Ablativ | improba, improbo, improbo, improbabilis, improbabiles, improbabilibus, improbalitas | improbissima, improbissimorum, improbissimae, improbissimos, improbissimam, improbissimum, improbissimas, improbissimus, improbissime, improbissimi, improbissimis, improbis, improbissimo |
| Vokativ | improbabilis, improbe, improbabiles, improbum, improbabilibus, improbalitas, improba | improba, improbabilis, improbi, improbabiles, improbae, improbiter, imbrobi, improbiorem, improbiusque, improbabilibus, improbalitas |
