Déclinaison / Conjugueur latin
| SINGULIER |
| Nom. | decumus |
| Gen. | decumi |
| Dat. | decumo |
| Acc. | decumum |
| Abl. | decumo |
| Voc. | decume |
| PLURIEL |
| Nom. | decumi |
| Gen. | decumōrum |
| Dat. | decumis |
| Acc. | decumos |
| Abl. | decumis |
| Voc. | decumi |
| SINGULIER |
| Nom. | decumă |
| Gen. | decumae |
| Dat. | decumae |
| Acc. | decumam |
| Abl. | decumā |
| Voc. | decumă |
| PLURIEL |
| Nom. | decumae |
| Gen. | decumārum |
| Dat. | decumis |
| Acc. | decumas |
| Abl. | decumis |
| Voc. | decumae |
| SINGULIER |
| Nom. | decumum |
| Gen. | decumi |
| Dat. | decumo |
| Acc. | decumum |
| Abl. | decumo |
| Voc. | decumum |
| PLURIEL |
| Nom. | decuma |
| Gen. | decumōrum |
| Dat. | decumis |
| Acc. | decuma |
| Abl. | decumis | |