Deklinationen
| Singular | Plural | |
|---|---|---|
| Nominativ | singular sg ōstium | plural pl ōstia |
| Genitiv | singular sg ōstiī | plural pl ōstiōrum |
| Dativ | singular sg ōstiō | plural pl ōstiīs |
| Akkusativ | singular sg ōstium | plural pl ōstia |
| Ablativ | singular sg ōstiō | plural pl ōstiīs |
| Vokativ | singular sg ōstium | plural pl ōstia |