| Singular | Plural | |
|---|---|---|
| Nominativ | institutum, institutumque, institutia, institutom | institutaque, instituta |
| Genitiv | instituti | institutorum, institutorumque |
| Dativ | institutoque, instituto | institutis, institutisque, istitutis |
| Akkusativ | institutum, institutumque | instituta, institutaque |
| Ablativ | institutoque, instituto, institutia | institutis, institutisque, istitutis |
| Vokativ | institutum, institutumque, institutia | instituta, institutaque |