| ouppräknelig | nieprzeliczalny |
| Our Love To Admire | Our Love To Admire |
| Ourense | Ourense |
| Ouro Preto | Ouro Preto |
| Out of the Blue | Out Of The Blue |
| Out of Time | Out of Time |
| Outande | Outing |
| Outaouais | Outaouais |
| outhärdligt | nieznośny |
| OutKast | Outkast |
| Outlook Express | Outlook Express |
| Outremer | Ziemia Święta |
| outtalad | cichy |
| Ouzo | Ouzo |
| ovan | nad |
| ovana | nałóg |
| ovanlig | niezwykły |
| ovanpå | na |
| Ovanåkers kommun | Gmina Ovanåker |
| Ove | Uwe |
| Ove Höegh-Guldberg | Ove Høegh-Guldberg |
| Ove Sprogøe | Ove Sprogøe |
| Over the Hedge | Skok przez płot |
| Over the Hills and Far Away | Over the Hills and Far Away |
| Overhalla kommun | Overhalla |
| Overijssel | Overijssel |
| ovetandes | nieświadomie |
| ovett | reprymenda |
| Ovidius | Owidiusz |
| Oviedo | Oviedo |
| Oviraptoider | Owiraptorozaury |
| Oviraptor | Owiraptor |
| Ovovivipar | Jajożyworodność |
| OVS-språk | OVS |
| ovum | jajko |
| ovän | wróg |
| oväntad | nieoczekiwany |
| oväntat | nieoczekiwanie |
| oväsen | hałas |
| ovårdad | niechlujny |
| Owain Glyndŵr | Owen Glendower |
| Owen Chamberlain | Owen Chamberlain |
| Owen County | Hrabstwo Owen |
| Owen Sound | Owen Sound |
| Owen Willans Richardson | Owen Willans Richardson |
| Owen Wilson | Owen Wilson |
| Owensboro | Owensboro |
| Oxalsyra | Kwas szczawiowy |
| Oxalättiksyra | Kwas szczawiooctowy |
| Oxana Fedorova | Oksana Fiodorowa |
| Oxazepam | Oksazepam |
| Oxdjur | Bovinae |
| oxe | wół |
