sort by Rank | Alpha
| Possible Meanings | Rank |
|---|
| Office National des Forets | ***** |
| Old Norman French | *** |
| Oficina Nacional Forestal | *** |
| Oncology Nurses Forum | *** |
| Ozark National Forest | *** |
| Okanogan National Forest | *** |
| open Nissen fundoplication | ** |
| Oslo Numismatiske Forening | ** |
| Ovulation from normal follicle | ** |
| other non financial | ** |
| Operation Never Forget | ** |
| Oncology Nursing Foundation | ** |
| Olfactory Nerve Fibroblasts | ** |
| Other Non Ferrous | ** |
| Operation New Frontiers | ** |
| Ottawa National Forest | ** |
| Oberste Nationale Flugsportkommission | ** |
| Ozark Natural Foods | ** |
| Oconee National Forest | ** |
| Oakland Noodle Factory | * |
| Old Northern French | * |
| Oceania Netball Federation | * |
| Office National de la Famille | * |
| Office National des ForOts | * |
| One Name Federal | * |
| Orient Number Five | * |
| Orient Number Four | * |
| Orion Network Fragile | * |