Déclinaison / Conjugueur latin
| SINGULIER |
| Nom. | octingenarius |
| Gen. | octingenarii |
| Dat. | octingenario |
| Acc. | octingenarium |
| Abl. | octingenario |
| Voc. | octingenarie |
| PLURIEL |
| Nom. | octingenarii |
| Gen. | octingenariōrum |
| Dat. | octingenariis |
| Acc. | octingenarios |
| Abl. | octingenariis |
| Voc. | octingenarii |
| SINGULIER |
| Nom. | octingenariă |
| Gen. | octingenariae |
| Dat. | octingenariae |
| Acc. | octingenariam |
| Abl. | octingenariā |
| Voc. | octingenariă |
| PLURIEL |
| Nom. | octingenariae |
| Gen. | octingenariārum |
| Dat. | octingenariis |
| Acc. | octingenarias |
| Abl. | octingenariis |
| Voc. | octingenariae |
| SINGULIER |
| Nom. | octingenarium |
| Gen. | octingenarii |
| Dat. | octingenario |
| Acc. | octingenarium |
| Abl. | octingenario |
| Voc. | octingenarium |
| PLURIEL |
| Nom. | octingenaria |
| Gen. | octingenariōrum |
| Dat. | octingenariis |
| Acc. | octingenaria |
| Abl. | octingenariis | |