| Termen/ Term | Nr. aparižii/ No. occurrences |
| NUCET | 4 |
| NUCSOARA | 33 |
| NURJUIENI | 1 |
| OANTU | 5 |
| OBAD | 1 |
| OBIRSA | 280 |
| OBIRSIA | 22 |
| OBIRSIA CLOSANI | 8 |
| OBIRSIA NOUA | 3 |
| OBIRSIA-CLOSANI | 1 |
| OBISLAVU | 1 |
| OBOGA | 5 |
| OBOGA DE JOS | 9 |
| OBOGA DE MIJLOC | 3 |
| OBOGA DE SUS | 20 |
| OCEA | 3 |
| OCNA DEJULUI | 1 |
| OCOLIS | 7 |
| OCOLISU MARE | 17 |
| ODOBESTI | 1 |
| ODRIHEI | 1 |
| OGRADENA | 9 |
| OGRETIN | 1 |
| OHABA | 45 |
| OHABA DE SUB PIATRA | 1 |
| OHABA PONOR | 1 |
| OHABA STREIULUI | 1 |
| OHABA-MITMIC | 1 |
| OHABA-PONOR | 1 |
| OHABA-SIBISEL | 1 |
| OHABITA | 1 |
| OLARI | 8 |
| OLTEANCA | 2 |
| OLTEANU | 1 |
| OLTENI | 1 |
| OLTET | 12 |
| OLTINA | 1 |
| ONCESTI | 21 |
| ONEAGA | 2 |
| ORASANI | 1 |
| ORASTIOARA DE JOS | 138 |
| ORASTIOARA DE SUD | 1 |
| ORASTIOARA DE SUS | 2 |
| ORATIA | 2 |
| ORBEASCA | 1 |
| ORBEASCA DE SUS | 2 |
| ORBENII DE SUS | 1 |
| OREAVU | 1 |
| ORLASTI | 1 |
| ORLEA | 2 |