| Singular | Plural | |
|---|---|---|
| Nominativ | planaque, planum, planus, plana | planae, plani, planaque, plana |
| Genitiv | planae, plani, plani | planorum, planorum, planarum |
| Dativ | plano, plano, planae | planis, planisque, planissume |
| Akkusativ | planam, planum, planum | plana, planos, planaque, planas, planasiam |
| Ablativ | plano, plano, planaque, plana | planis, planisque, planissume |
| Vokativ | plane, planecommode, planesentiam, planaque, planum, plana | plana, planae, plani, planaque |
| Singular | Plural | |
|---|---|---|
| Nominativ | planior, planius, planiuscula, planiusculo | planiora, planiores |
| Genitiv | — | — |
| Dativ | — | planioribus |
| Akkusativ | planiusculo, planius, planiorem, planiuscula | planiora, planiores |
| Ablativ | — | planioribus |
| Vokativ | planior, planius, planiuscula, planiusculo | planiora, planiores |
| Singular | Plural | |
|---|---|---|
| Nominativ | planissima | planissima |
| Genitiv | — | — |
| Dativ | planissimo, planissimo | planissimis |
| Akkusativ | — | planissima |
| Ablativ | planissimo, planissimo, planissima | planissimis |
| Vokativ | planissima, planissime, planissimeque | planissima |
| Grundform | |
|---|---|
| Positiv | — |
| Komparativ | — |
| Superlativ | planissime, planissimeque |