| Sg | Pl | |
| Nom | śomo | ? (rule) |
| Voc | ? (rule) | ? (rule) |
| Obl | śomo (rule) | śomoṃ (rule) |
| Gen | śomontse (rule) | śomoṃts (rule) |
| Loc | śomone (rule) | ? (rule) |
| Abl | śomomeṃ (rule) | ? (rule) |
| Perl | śomosa (rule) | ? (rule) |
| Com | śomompa (rule) | ? (rule) |
| All | śomośc (rule) | ? (rule) |
| Caus | śomoñ (rule) | ? (rule) |