| Other Voices | The Doors |
| other waste | ostatní odpad |
| other way round | opačně |
| otherness | rozdílnost |
| others | jiní |
| otherwise | sice |
| otherworldly | na věčnosti |
| Othniel Charles Marsh | Othniel Charles Marsh |
| Otho | Otho |
| otic | ušní |
| otiose | zbytečný |
| Otis | Otis |
| otitis | ortitida |
| OTK | Over The Knee |
| OTL | Out To Lunch |
| otoganglion | otoganglion |
| OTOH | On The Other Hand |
| Otok | Otok Dalmatinski |
| Otokar Březina | Otokar Březina |
| otology | ušní lékařství |
| Otomat | Théseus |
| OTOOH | On The Other Other Hand |
| Otoskopy | Otolmoskop |
| Otra | Otra |
| Otranto | Otrantský průliv |
| Ott | Ott |
| Ottawa | Ottawa |
| Ottawa River | Ottawa |
| Ottawa Senators | Ottawa Senators |
| otter | vydra |
| otters | vydry |
| OTTH | On The Third Hand |
| Otto | Otto |
| Otto cycle | Ottův motor |
| Otto de la Roche | Otto de la Roche |
| Otto Hahn | Otto Hahn |
| Otto I | Ota I. Veliký |
| Otto Jespersen | Otto Jespersen |
| Otto Lilienthal | Otto Lilienthal |
| Otto Mann | Oto |
| Otto of Bavaria | Oto |
| Otto of Savoy | Oto |
| Otto Skorzeny | Otto Skorzeny |
| Otto Stern | Otto Stern |
| Otto Ville Kuusinen | Otto Ville Kuusinen |
| Otto von Bismarck | Otto von Bismarck |
| Otto von Guericke | Otto von Guericke |
| Otto von Habsburg | Otto von Habsburg |
| Otto Wagner | Otto Wagner |
| Otto Wallach | Otto Wallach |
| Otto Wichterle | Otto Wichterle |
| ottoman | pohovka |
| Ottoman Dynasty | Osmani |
| Ottoman Empire | Otomanská říše |
| Ottoman Greece | Řecko |
| Ottoman Turks | Turci |
| OTTOMH | Off The Top Of My Head |
| OTTOMHAROO | Off the Top of My Head and Rolling Out of Bounds |
| Ottorino Respighi | Ottorino Respighi |
| OTW | On The Whole |
| otěhotnět s někým | get pregnant by someone |
| Ouagadougou | Ouagadougou |
| Oubangui-Chari | Ubangi-Šari |
| oubliette | hladomorna |
| ouch | au |
| Oudenaarde | Oudenaarde |
| Ouest Department | Západ |
| ought | by měl |
| ought to | měl by |
| Oulipo | Oulipo |
| Oulton Park International Gold Cup | International Gold Cup |
| Oulu | Oulu |
| Oulu Province | Oulu |
| Oulu railway station | Oulu |
| Oulujoki | Oulujoki |
| Oulujärvi | Oulujärvi |
| Oulunsalo | Oulunsalo |
| Oum Er-Rbia River | Umm Er Rbia |
| ounce | unce |
| ounces | unce |
| our | náš |
| our daily bread | chléb náš vezdejší |
| Our Lady of Fatima | Zjevení Panny Marie ve Fatimě |
| Our Lady of Guadalupe | Panna Maria Guadalupská |
| Our Land | Finská hymna |
| Our Ukraine | Naše Ukrajina |
| Our Ukraine Bloc | Naše Ukrajina |
| Ouranosaurus | Ouranosaurus |
| Ouroboros | Uroboros |
| ours | náš |
| ourselves | sebe |
| oust | odstranit |
| ousted | vyhnal |
| ouster | vyhoštění |
| out | aut |
| out and out | naprostý |
| out from curiosity | ze zvědavosti |
| out in the open | veřejný |
| out loud | nahlas |
| out of | mimo |
