| Singular | Plural | |
|---|---|---|
| Nominativ | facundus, facunda, facundum | facundi, facunda, facundiores, facundae |
| Genitiv | facundi, facundi, facundiores, facundiores, facundae | facundarum, facundorum, facundorum |
| Dativ | facundo, facundo, facundae | facundissimum, facundissimus, facundis, facundissimis |
| Akkusativ | facundam, facundum, facundum | facundas, facundos, facunda |
| Ablativ | facundo, facundo, facunda | facundissimis, facundissimum, facundissimus, facundis |
| Vokativ | facunde, facunda, facundum | facundae, facundi, facunda, facundiores |
| Singular | Plural | |
|---|---|---|
| Nominativ | facundior | facundiores |
| Genitiv | — | — |
| Dativ | — | — |
| Akkusativ | — | facundiores |
| Ablativ | — | — |
| Vokativ | facundior | facundiores |
| Singular | Plural | |
|---|---|---|
| Nominativ | facundissimum, facundissimus | — |
| Genitiv | — | — |
| Dativ | — | facundissimis |
| Akkusativ | facundissimum, facundissimum | — |
| Ablativ | — | facundissimis |
| Vokativ | facundissimum | — |