Déclinaison / Conjugueur latin
| SINGULIER |
| Nom. | fallax |
| Gen. | fallacis |
| Dat. | fallaci |
| Acc. | fallacem |
| Abl. | fallaci |
| Voc. | fallax |
| PLURIEL |
| Nom. | fallaces |
| Gen. | fallacĭum, fallacum |
| Dat. | fallacĭbus |
| Acc. | fallaces |
| Abl. | fallacĭbus |
| Voc. | fallaces |
| SINGULIER |
| Nom. | fallax |
| Gen. | fallacis |
| Dat. | fallaci |
| Acc. | fallacem |
| Abl. | fallaci |
| Voc. | fallax |
| PLURIEL |
| Nom. | fallaces |
| Gen. | fallacĭum, fallacum |
| Dat. | fallacĭbus |
| Acc. | fallaces |
| Abl. | fallacĭbus |
| Voc. | fallaces |
| SINGULIER |
| Nom. | fallax |
| Gen. | fallacis |
| Dat. | fallaci |
| Acc. | fallax |
| Abl. | fallaci |
| Voc. | fallax |
| PLURIEL |
| Nom. | fallacĭa |
| Gen. | fallacĭum, fallacum |
| Dat. | fallacĭbus |
| Acc. | fallacĭa |
| Abl. | fallacĭbus | |