| ointment | Balsam |
| ointment base | Salbengrundlage |
| ointment for burns | Brandsalbe |
| ointment jar | Salbendose |
| ointment-like faeces | salbenartiger Stuhl |
| ointment-like feces | salbenartiger Stuhl |
| ointments | Salben |
| Oio Region | Oio |
| Oirase River | Oirase |
| Oirats | Oiraten |
| Oireachtas | Irisches Parlament |
| Oisc of Kent | Oeric |
| Oise | Oise |
| Oise River | Oise |
| Oita | Oita |
| oiticica oil | Oiticica-Öl |
| OJ | OJ |
| Ojamajo Doremi | DoReMi |
| Ojibwa | Anishinabe |
| Ojibwe | Ojibwe |
| Ojos del Salado | Ojos del Salado |
| Ojus | Ojus |
| OK | einverstanden |
| OK : Oklahoma - Oklahoma City | Oklahoma |
| OK Budućnost Podgorica | OK Budućnost Podgorica |
| OK Go | OK Go |
| OK, OK! | jaja! |
| OK, that's fine. | Das hat geklappt. |
| Oka | Oka |
| Oka River | Oka |
| Oka's theorem | Satz von Oka |
| Okaloosa County | Okaloosa County |
| Okanagan Lake | Okanagan Lake |
| Okane ga nai | Okane ga nai |
| okapi | Okapi |
| Okapi Wildlife Reserve | Okapi-Nationalpark |
| okapis | Waldgiraffen |
| OKATO | OKATO |
| Okavango | Okawango |
| Okavango Delta | Okawango-Becken |
| Okavango Region | Kavango |
| Okavango River | Okawango |
| okay | einverstanden |
| okay sth. | etw. absegnen |
| Okayama | Okayama |
| Okayama Prefecture | Präfektur Okayama |
| okaying | genehmigend |
| okays | genehmigt |
| Okazaki fragment | Okazaki-Fragment |
| OKB | Experimental-Konstruktionsbüro |
| Okeanos | Okeanos |
| Okeechobee County | Okeechobee County |
| Okeh Records | Okeh Records |
| Okehampton | Okehampton |
| Okemos | Okemos |
| Okene | Okene |
| okenite | Okenit |
| Oker | Oker |
| Oker river | Oker |
| okey | einverstanden |
| okey dokey | habe verstanden |
| Okey! | Ist recht! |
| okey-doke, righto | das ist gebongt |
| okey-dokey | paletti |
| Okey-dokey! | Einverstanden! |
| OKFOL | OKFOL |
| OKG | Kernkraftwerk Oskarshamn |
| Okhotsk | Ochotsk |
| okhotskite | Okhotskit |
| Okhranka | Ochrana |
| Okhtyrka | Ochtyrka |
| Oki Islands | Oki-Inseln |
| Oki Province | Provinz Oki |
| Okie | Okie |
| Okies | Okies |
| Okinawa | Okinawa |
| Okinawa Churaumi Aquarium | Okinawa-Churaumi-Aquarium |
| Okinawa Island | Okinawa Hontō |
| Okinawa pine | Okinawa-Kiefer |
| Okinawa Prefecture | Präfektur Okinawa |
| okinawa rail | Okinawaralle |
