Déclinaison / Conjugueur latin
| SINGULIER |
| Nom. | fastosus |
| Gen. | fastosi |
| Dat. | fastoso |
| Acc. | fastosum |
| Abl. | fastoso |
| Voc. | fastose |
| PLURIEL |
| Nom. | fastosi |
| Gen. | fastosōrum |
| Dat. | fastosis |
| Acc. | fastosos |
| Abl. | fastosis |
| Voc. | fastosi |
| SINGULIER |
| Nom. | fastosă |
| Gen. | fastosae |
| Dat. | fastosae |
| Acc. | fastosam |
| Abl. | fastosā |
| Voc. | fastosă |
| PLURIEL |
| Nom. | fastosae |
| Gen. | fastosārum |
| Dat. | fastosis |
| Acc. | fastosas |
| Abl. | fastosis |
| Voc. | fastosae |
| SINGULIER |
| Nom. | fastosum |
| Gen. | fastosi |
| Dat. | fastoso |
| Acc. | fastosum |
| Abl. | fastoso |
| Voc. | fastosum |
| PLURIEL |
| Nom. | fastosa |
| Gen. | fastosōrum |
| Dat. | fastosis |
| Acc. | fastosa |
| Abl. | fastosis | |