sort by Rank | Alpha
| Possible Meanings | Rank |
| OFOQ Human Resources | **** |
| Of the High Representative | **** |
| Optimal Hedge Ratio | **** |
| Oakland History Room | *** |
| of high representative | *** |
| Office of Historic Resources | *** |
| Office of High Representative | *** |
| Occupational Health Research | *** |
| Occupational Health Review | *** |
| Over Horizon RADAR | *** |
| Office of Human Relations | ** |
| open hernia repair | ** |
| overall 'heaveiness rating | ** |
| oxidative hemolysis rate | ** |
| Offices of Human Resources | ** |
| organic hydroperoxide resistance | ** |
| Office of Human Research | ** |
| Over the Horizon Radar | ** |
| Open Health Registry | ** |
| Oral Health Reviews | ** |
| Outpatient Health Records | ** |
| One Helluva Ride | ** |
| Oklahoma Health Research | ** |
| Oliver Halsman Rosenberg | ** |
| Open Heart Reports | ** |
| Out of Home Respite | ** |
| Office of the Higher Representative | ** |
| Office of Housing Research | ** |
| Oak Hill Raceway | * |
| Office for Human Resources | * |
| Off Highway Recreation | * |
| Organisational Health Review | * |
| Occupational Health Regulations | * |
| Offices Human Resources | * |
| Old Hawaii Recipes | * |
| Olson Hereford Ranch | * |
| Occupational Health Record | * |
| Operational Hydrologic Remote | * |
| Obvious High Risk | * |
| Office of Human Rights | * |
| Office of Hydraulics and River | * |
| Operator or His Representative | * |