| Singular | Plural | |
|---|---|---|
| Nominativ | concinnus, concinna, concinnum | concinna, concinnae, concinni |
| Genitiv | concinnae, concinni, concinni | — |
| Dativ | concinnae, concinno, concinno | concinnis |
| Akkusativ | concinnum, concinnum, concinnam | concinna, concinnas |
| Ablativ | concinna, concinno, concinno | concinnis |
| Vokativ | concinna, concinnum, concinne | concinna, concinnae, concinni |
| Singular | Plural | |
|---|---|---|
| Nominativ | concinnior, concinnius | concinniores |
| Genitiv | — | — |
| Dativ | — | — |
| Akkusativ | concinnius | concinniores |
| Ablativ | — | — |
| Vokativ | concinnior, concinnius | concinniores |
| Singular | Plural | |
|---|---|---|
| Nominativ | — | — |
| Genitiv | — | — |
| Dativ | — | — |
| Akkusativ | — | — |
| Ablativ | — | — |
| Vokativ | concinnissime | — |