| Oman | Oman |
| Omanka | Omanaise |
| Omar | Omar |
| Omar al-Baszir | Omar el-Béchir |
| Omar Bongo | Omar Bongo Ondimba |
| Omar Bradley | Omar Bradley |
| Omar Chajjam | Omar Khayyam |
| Omar Hashim Epps | Omar Epps |
| Omar Karami | Omar Karamé |
| Omar Mukhtar | Omar Al Mokhtar |
| Omar Sharif | Omar Sharif |
| Omar Sívori | Omar Sivori |
| Omari Tetradze | Omari Tetradze |
| Omarlicowate | Silphidae |
| Omatnikowate | Theridiidae |
| omawiać | traiter |
| Omawiać warunki | Franchir un obstacle |
| Omańczyk | Omanais |
| omański | omanais |
| ombudsman | ombudsman |
| Omdurman | Omdourman |
| Ome | Ome |
| omega | oméga |
| OmegaWiki | OmegaWiki |
| Omegna | Omegna |
| Omeprazol | Oméprazole |
| Omerta | Omertà |
| Omfacyt | Omphacite |
| Omfale | Omphale |
| omikron | omicron |
| Omloop Het Volk | Het Volk |
| omnibus | omnibus |
| Omo | Omo |
| Omomierz | Ohmmètre |
| Omomiłkowate | Cantharidae |
| OMON | OMON |
| Omonia Nikozja | Omonia Nicosie |
| omowy | ohmique |
| Omołon | Omolon |
| OMR | Reconnaissance optique de marques |
| Omri | Omri |
| Omri Szaron | Omri Sharon |
| Omsk | Omsk |
| Omskavia | Omskavia Airlines |
| Omurtag | Omourtag |
| Omuta | Ōmuta |
| OMV | OMV |
| on | il |
| On an Island | On an Island |
| On the Night | On The Night |
| On Through The Night | On Through the Night |
| ona | elle |
| Ona mnie nienawidzi | She Hate Me |
| Onan | Onan |
| Onani | Onanì |
| onanizm | masturbation |
| Once in a LIVEtime | Once In A LIVEtime |
| Oncilla | Leopardus tigrinus |
| Ondansetron | Ondansétron |
| Ondol | Ondol |
| Ondřej Bank | Ondřej Bank |
| one | ils |
| One by One | One by One |
| One Canada Square | One Canada Square |
| One Night Stand | WWE One Night Stand |
| One Piece | One Piece |
| One Point O | One Point O |
| Oneg Szabat | Oyneg Shabbos |
| Onega | Lac Onega |
| Onegai Teacher | Onegai teacher |
| Onegai Twins | Onegai twins |
| Oneworld | Oneworld |
| Onex | Onex |
| Oneşti | Oneşti |
| ongi | jadis |
| oni | ils |
| Oni sami | Lui même |
| Oni żyją | Invasion Los Angeles |
| oniemiały | sans voix |
