| ocean-going | Hochsee- |
| ocean-going cruiser | Hochseejacht |
| ocean-going freighter | Hochseefrachter |
| ocean-going motor cruiser | Hochsee-Motorkreuzer |
| ocean-going salvage tug | Hochsee-Bergungsschlepper |
| ocean-going ship | Seeschiff |
| ocean-going steamer | Ozeandampfer |
| ocean-going trawler | Hochseetrawler |
| ocean-going tug | Hochseeschlepper |
| ocean-going vessel | Seeschiff |
| ocean-going yacht | Hochseejacht |
| ocean-going yachts | Hochseejachten |
| Oceana | Oceana |
| oceanarium | Ozeanarium |
| oceangoing | zur See fahrend |
| Oceania | Ozeanien |
| Oceania Club Championship | OFC Champions Cup |
| Oceania Football Confederation | Oceania Football Confederation |
| Oceania Footballer of the Year | Ozeaniens Fußballer des Jahres |
| Oceanian | ozeanisch |
| oceanic | ozeanisch |
| oceanic abyss | Tiefsee |
| oceanic bank | Guyot |
| Oceanic basin | Seebecken |
| oceanic blue | ozeanblau |
| oceanic bonito | Echter Bonito |
| oceanic climate | Meeresklima |
| Oceanic crust | Ozeanische Erdkruste |
| oceanic deep | Tiefseegraben |
| oceanic deeps | Tiefseegräben |
| Oceanic dolphin | Delfine |
| oceanic dolphins | Ozeandelfine |
| oceanic ecosystem | ozeanisches Ökosystem |
| oceanic fauna | Meeresfauna |
| oceanic flycatcher | Carolinenmonarch |
| oceanic island | Insel mitten im Ozean |
| Oceanic languages | Ozeanische Sprachen |
| oceanic level | Meeresspiegel |
| oceanic plankton | Meeresplankton |
| oceanic puffer | Blauer Kugelfisch |
| oceanic sharks | Hochseehaie |
| Oceanic trench | Tiefseerinne |
| oceanic whitetip shark | Weißspitzen-Hochseehai |
| Oceanica | Ozeanien |
| Oceanid | Okeanide |
| Oceanliner | Schiff |
| oceanographer | Meereskundler |
| oceanographers | Meeresforscher |
| oceanographic | ozeanographisch |
| Oceanographic Museum | Ozeanographisches Museum Monaco |
| oceanographic research | Erforschung der Meere |
| oceanographic research ship | ozeanographisches Forschungsschiff |
| oceanographic research vessel | ozeanographisches Forschungsschiff |
| oceanographical | ozeanographisch |
| oceanographically | ozeanographisch |
| oceanography | Meereskunde |
| oceanological | ozeanologisch |
| oceanologically | ozeanologisch |
| oceanologist | Ozeanologe |
| oceanology | Ozeanografie |
| oceans | Ozeane |
| Oceanside | Oceanside |
| Oceanus | Okeanos |
| Oceanus Procellarum | Oceanus Procellarum |
| oceanway | Strandpromenade |
| ocellaris clown | Oranger Ringelfisch |
| Ocellaris clownfish | Clownfische |
| ocellated antbird | Halsband-Ameisenvogel |
| ocellated carpet viper | Westafrikanische Sandrasselotter |
| ocellated crake | Schomburgkralle |
| Ocellated Lizard | Perleidechse |
| ocellated poorwill | Augennachtschwalbe |
| ocellated pufferfish | Glühaugen-Kugelfisch |
| ocellated quial | Tränenwachtel |
| ocellated skink | Gefleckter Walzenskink |
| ocellated tapaculo | Perlenmanteltapaculo |
| ocellated thrasher | Tropfenspottdrossel |
| ocellated turkey | Pfauentruthuhn |
| ocellated woodcreeper | Augenbaumsteiger |
| ocelot | Pardelkatze |
| ocelot coat | Ozelot |
| ocelot stole | Ozelot |
| Ochakiv | Otschakiw |
| ocher | Ocker |
| ocher yellow | bräunlichgelb |
| Ochiltree County | Ochiltree County |
| Ochlenberg | Ochlenberg |
| ochlocracy | Ochlokratie |
| Ochlophobia | Enochlophobie |
| Ochnaceae | Ochnaceae |
| Ocho Ríos | Ocho Rios |
| ochraceous attila | Goldbürzelattila |
| ochraceous bearded bulbul | Rostbauchbülbül |
| ochraceous pewee | Ockerbrusttyrann |
| ochraceous piculet | Ockerzwergspecht |
| ochraceous-breasted flycatcher | Goldkehltyrann |
| Ochratoxin | Ochratoxine |
| ochratoxin A | Ochratoxin A |
| ochratoxin B | Ochratoxin B |
| ochratoxin C | Ochratoxin C |
| ochratoxins | Ochratoxine |
| ochre | Ocker |
| ochre brown | ockerbraun |
| ochre mill | Ockermühle |
| ochre mole rat | Zentralafrikanischer Graumull |
| ochre mole-rat | Zentralafrikanischer Graumull |
| ochre yellow | ockergelb |
| ochre-bellied flycatcher | Ockerbauch-Pipratyrann |
| ochre-bellied hawk owl | Ockerbauchkauz |
| ochre-bellied hawk-owl | Ockerbauchkauz |
| ochre-breasted brush finch | Ockerbrust-Buschammer |
| ochre-breasted brush-finch | Ockerbrust-Buschammer |
| ochre-breasted brushfinch | Ockerbrust-Buschammer |
| ochre-breasted pipit | Ockerbrustpieper |
| ochre-breasted spinetail | Ockerbrustschlüpfer |
| ochre-breasted tanager | Ockerbrusttangare |
| ochre-browed thistletail | Ockerbrauenschlüpfer |
| ochre-chested antpitta | Ockerbruststelzling |
| ochre-ckeeked spinetail | Goldohrschlüpfer |
| ochre-colored | ocker |
| ochre-coloured | ocker |
| ochre-faced tody flycatcher | Zimtkehl-Spateltyrann |
| ochre-flanked tapaculo | Rostflankentapaculo |
| ochre-fronted antpitta | Ockerkappenstelzling |
| ochre-hackled starfish | Grosser Kamm-Seestern |
| ochre-marked parakeet | Blaulatzsittich |
| ochre-naped ground tyrant | Gelbnackentyrann |
| ochre-rumped antbird | Rostbürzel-Ameisenfänger |
| ochre-rumped bunting | Mandschurenammer |
| ochre-striped antpitta | Rostkehl-Ameisenpitta |
| ochreous | ockerhaltig |
| ochreous deposit | eisenhaltige Ablagerung |
| ochronosis | Ochronose |
| ochrous | ockerhaltig |
| Ochsenfurt | Ochsenfurt |
| Ochsenhausen | Ochsenhausen |
| Ochtendung | Ochtendung |
| Ochtersum | Ochtersum |
| Ochtinská Aragonite Cave | Ochtinská aragonitová jaskyňa |
| Ochtrup | Ochtrup |
