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