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