Déclinaison / Conjugueur latin
| SINGULIER |
| Nom. | pentagonos |
| Gen. | pentagoni |
| Dat. | pentagono |
| Acc. | pentagonon |
| Abl. | pentagono |
| Voc. | pentagone |
| PLURIEL |
| Nom. | pentagoni |
| Gen. | pentagonōrum |
| Dat. | pentagonis |
| Acc. | pentagonos |
| Abl. | pentagonis |
| Voc. | pentagoni |
| SINGULIER |
| Nom. | pentagonă |
| Gen. | pentagonae |
| Dat. | pentagonae |
| Acc. | pentagonam |
| Abl. | pentagonā |
| Voc. | pentagonă |
| PLURIEL |
| Nom. | pentagonae |
| Gen. | pentagonārum |
| Dat. | pentagonis |
| Acc. | pentagonas |
| Abl. | pentagonis |
| Voc. | pentagonae |
| SINGULIER |
| Nom. | pentagonon |
| Gen. | pentagoni |
| Dat. | pentagono |
| Acc. | pentagonon |
| Abl. | pentagono |
| Voc. | pentagonon |
| PLURIEL |
| Nom. | pentagona |
| Gen. | pentagonōrum |
| Dat. | pentagonis |
| Acc. | pentagona |
| Abl. | pentagonis | |