| Kosmos | Nominativ, Singular | nominative case, singular | |
| Kosmose | Genitiv, Singular | genitive case, singular | |
| Kosmosen | Dativ, Singular | dative case, singular | |
| Kosmos(e)s | Akkusativ, Singular | accusative case, singular | |
| Kosmoser | Nominativ, Plural | nominative case, plural | |
| Kosmosern | Genitiv, Plural | genitive case, plural | |
| Kosmosn | Dativ, Plural | dative case, plural |