| Strong | ||||||
|---|---|---|---|---|---|---|
| Masculine | Feminine | Neuter | ||||
| Singular | Plural | Singular | Plural | Singular | Plural | |
| Nominative | cost | coste | cost | costa, coste | cost | cost |
| Accusative | costne | coste | coste | costa, coste | cost | cost |
| Genitive | costes | costra | costre | costra | costes | costra |
| Dative | costum | costum | costre | costum | costum | costum |
| Weak | ||||||
| Masculine | Feminine | Neuter | ||||
| Singular | Plural | Singular | Plural | Singular | Plural | |
| Nominative | costa | costan | coste | costan | coste | costan |
| Accusative | costan | costan | costan | costan | coste | costan |
| Genitive | costan | costra, costena | costan | costra, costena | costan | costra, costena |
| Dative | costan | costum | costan | costum | costan | costum |