| Case | Singular | Plural |
|---|---|---|
| nom | sedmispáč | sedmispáči |
| gen | sedmispáče | sedmispáčů |
| dat | sedmispáčovi, sedmispáči |
sedmispáčům |
| acc | sedmispáče | sedmispáče |
| voc | sedmispáči | sedmispáči |
| loc | sedmispáčovi, sedmispáči |
sedmispáčích |
| instr | sedmispáčem | sedmispáči |