| Toppmast | Nominativ, Singular | nominative case, singular | |
| Toppmast(e)s | Genitiv, Singular | genitive case, singular | |
| Toppmasten | Dativ, Singular | dative case, singular | |
| Toppmaste | Akkusativ, Singular | accusative case, singular | |
| Toppmasten | Nominativ, Plural | nominative case, plural |