| Case | Singular | Plural |
|---|---|---|
| Nominative | plānitia | plānitiae |
| Genitive | plānitiae | plānitiārum |
| Dative | plānitiae | plānitiīs |
| Accusative | plānitiam | plānitiās |
| Ablative | plānitiā | plānitiīs |
Examples from the PONS Dictionary (editorially verified)
- planities intermissa collibus