| Nominativ | opsius, ops, props, opulus | opes, hopes, panopes, steropes, tropes |
| Genitiv | opis, metopis | opum, oppium, canopum, aeropum, oropum, optutum, opium, propium |
| Dativ | ope, alope, opulo, calliope, opipares, metope, opimio, opiter, canopi, opimia, opiparem, cassiope, opeream, operebat, operorum, opevirginea, opi, opidani, opidanis, opidanorum, opidinis, opidis, opidum, opiionis, opinatio, opinatione, opinationem, opinationes, opinationis, opitercivm, propi, chalciope | opibus, obibus |
| Akkusativ | opem | opes, hopes, panopes, steropes, tropes, opulos |
| Ablativ | ope, alope, opulo, calliope, metope, cassiope, opeream, operebat, operorum, opevirginea, chalciope | opibus, obibus |
| Vokativ | opsius, ops, props | opes, hopes, panopes, steropes, tropes |
