| Singular | Plural | |
|---|---|---|
| Nominativ | obstantia | obstantiae |
| Genitiv | obstantiae, obstantiai | obstantiarum |
| Dativ | obstantiae, obstantiai | obstantiis, obstantiabus |
| Akkusativ | obstantiam | obstantias |
| Ablativ | obstantia, obstantiad | obstantiis, obstantiabus |
| Vokativ | obstantia | obstantiae |