| Singular | Plural | |
|---|---|---|
| Nominativ | structura | structurae |
| Genitiv | structurae, structurai | structurarum |
| Dativ | structurai, structurae | structuris, structurabus |
| Akkusativ | structuram | structuras |
| Ablativ | structura, structurad | structuris, structurabus |
| Vokativ | structura | structurae |