| Singular | Plural | |
|---|---|---|
| Nominativ | spinus, spinus | spinus, spinuus, spini |
| Genitiv | spinus, spini | spinorum, spinuum, spinum, spinum |
| Dativ | spinonem, spinu, spinui, spino | spinubus, spinibus, spinis |
| Akkusativ | spinom, spinum, spinum | spinos, spinus, spinuus |
| Ablativ | spinonem, spinu, spino | spinubus, spinibus, spinis |
| Vokativ | spinus, spine | spinus, spinuus, spini |