| oljemålning | oil painting |
| oljeproduktion | oil production |
| Oljeproduktionstopp | Hubbert peak theory |
| oljeraffinaderi | oil refinery |
| oljerigg | oil rig |
| oljeråvaror | oil-seeds |
| Oljeskiffer | Bituminous shale |
| oljesticka | dipstick |
| oljeställ | oilskins |
| oljetanker | oil tanker |
| oljetryck | oleograph |
| Oljetrycksmätare | Barometer |
| oljetråg | oil pan |
| oljeutsläpp | oil slick |
| oljeutvinning | oil extraction |
| oljig | oily |
| oljning | oiling |
| oljor | oils |
| oljud | clamor |
| Olkusz | Olkusz |
| Ollantaytambo | Ollantaytambo |
| Olli Jokinen | Olli Jokinen |
| Olli Rehn | Olli Rehn |
| Ollie | Ollie |
| ollon | glans |
| ollonborre | cockchafer |
| Ollonmaskar | Acorn worm |
| ollonsträng | frenulum |
| Olmeker | Olmec |
| Olof av Danmark och Norge | Olav IV of Norway |
| Olof av Norge | Olaf II of Norway |
| Olof Björnsson | Olof Björnsson |
| Olof Haraldsson | Olaf II of Denmark |
| Olof Hunger | Olaf I of Denmark |
| Olof Palme | Olof Palme |
| Olof Palmepriset | Olof Palme Prize |
| Olof Skötkonung | Olof Skötkonung |
| Olof Swartz | Olof Swartz |
| Olof Vilhelm Arrhenius | Olof Vilhelm Arrhenius |
| Olofsborg | Olavinlinna |
| Olofströms kommun | Olofström Municipality |
| ologisk | stupid |
| Olokun | Olokun |
| Olomouc | Olomouc |
| Olonets | Olonets |
| Olongapo City | Olongapo City |
| olovlig | illicit |
| olovligt reproducera | pirate |
| OLPC | One Laptop per Child |
| Olsen-banden | Olsen Gang |
| Olsztyn | Olsztyn |
| Olszyna | Olszyna |
| Olt | Olt County |
| Oltcit | Oltcit |
| Oltingen | Oltingen |
| olust | disinclination |
