Declension tables
res, rei (f) - thing
| Case | sing. | pl. |
| Nom. | res | res |
| Acc. | rem | res |
| Gen. | rei | rerum |
| Dat. | re | rebus |
| Abl. | re | rebus |
Other examples of fifth declension nouns include dies (day), fides (trust, faith), spes (hope).
They are all feminine except for dies and compounds with dies.
Note with res that it is often found in the compound res publica (republic). This can be written as two words or one, but both parts decline:
| Case | sing. |
| Nom. | res publicam |
| Acc. | rem publicam |
| Gen. | rei publicae |
| Dat. | re publicae |
| Abl. | re publica |
