| Singular | Plural | |
|---|---|---|
| Nominativ | ferrugo | ferrugines |
| Genitiv | ferruginis, verruginis | ferruginium, ferruginum |
| Dativ | ferrugini, ferrugine, verrugine | ferruginibus |
| Akkusativ | ferruginem, verruginem | verruginis, ferruginis, ferrugines |
| Ablativ | ferrugine, verrugine | ferruginibus |
| Vokativ | ferrugo | ferrugines |