| Frontsystem | Nominativ, Singular | nominative case, singular | |
| Frontsystem(e)s | Genitiv, Singular | genitive case, singular | |
| Frontsystem(e) | Dativ, Singular | dative case, singular | |
| Frontsystem | Akkusativ, Singular | accusative case, singular | |
| Frontsysteme | Nominativ, Plural | nominative case, plural | |
| Frontsysteme | Genitiv, Plural | genitive case, plural | |
| Frontsystemen | Dativ, Plural | dative case, plural | |
| Frontsysteme | Akkusativ, Plural | accusative case, plural |