| Singular | Plural | |
|---|---|---|
| Nominativ | conjecturale | conjecturalia |
| Genitiv | coniecturalis | conjecturalium, conjecturalum |
| Dativ | conjecturale, conjecturali | conjecturalibus |
| Akkusativ | conjecturale | conjecturalia |
| Ablativ | conjecturali, conjecturale | conjecturalibus |
| Vokativ | conjecturale | conjecturalia |