All abbreviations and full forms starting with O
| Term | Full Form | Category |
|---|---|---|
| O | Onions 
| Others |
| O | Online
| Others |
| O | Only
| Others |
| O | Onset
| Others |
| O | Oort
| Others |
| O | Open
| Others |
| O | Opening
| Others |
| O | Operate
| Others |
| O | Operating
| Others |
| O | Operations
| Others |
| O | Operator
| Others |
| O | Oplegger
| Others |
| O | Opportunities
| Others |
| O | Opportunity
| Others |
| O | Oprah
| Others |
| O | Optimism
| Others |
| O | Optimization
| Others |
| O | Optional
| Others |
| O | Orange
| Others |
| O | Orchestra
| Others |
| O | Ordentlich
| Others |
| O | Order
| Others |
| O | Ordinary
| Others |
| O | Organism
| Others |
| O | Orifice
| Others |
| O | Original
| Others |
| O | Originality
| Others |
| O | Oriundo
| Others |
| O | Ossie
| Others |
| O | Ost
| Others |
| O | Osten
| Others |
| O | Osteoarthritis
| Others |
| O | Ostrich
| Others |
| O | Others
| Others |
| O | Out
| Others |
| O | Outcome
| Others |
| O | Outcomes
| Others |
| O | Outdoor
| Others |
| O | Outdoors
| Others |
| O | Outer
| Others |
| O | Outpouring
| Others |
| O | Output
| Others |
| O | Outrageous
| Others |
| O | Outreach
| Others |
| O | Outside
| Others |
| O | Outstanding
| Others |
| O | Ovangkol
| Others |
| O | Over
| Others |
| O | Overall impression
| Others |
| O | Overclocking
| Others |