| Singular | Plural | |
|---|---|---|
| Nominativ | tonitrus | tonitrus, tonitruus |
| Genitiv | tonitrus, tonitri, tonitros | tonitruum, tonitrum |
| Dativ | tonitru, tonitrui | tonitribus, tonitrubus |
| Akkusativ | tonitrum | tonitrus, tonitruus |
| Ablativ | tonitru | tonitribus, tonitrubus |
| Vokativ | tonitrus | tonitrus, tonitruus |
12 (25) Formen für „tonitrus“