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