| Obrium complanatum | Obrium constricticolle | Obrium constricticollis |
| Obrium consulare | Obrium coomani | Obrium cordicolle |
| Obrium cordicollis | Obrium costaricum | Obrium cribripenne |
| Obrium cruciferum | Obrium dejeanii | Obrium dentatum |
| Obrium dimidiatum | Obrium discoideum | Obrium dominicum |
| Obrium dorsale | Obrium elongatum | Obrium fabricianum |
| Obrium facetum | Obrium filicorne | Obrium formosanum |
| Obrium foveipenne | Obrium fractum | Obrium fumigatum |
| Obrium fuscatum | Obrium fuscoapicalis | Obrium giesberti |
| Obrium glabrum | Obrium guttigerum | Obrium gynandropsidis |
| Obrium hainanum | Obrium hattai | Obrium helvolum |
| Obrium howdeni | Obrium huae | Obrium ibidionoides |
| Obrium immite | Obrium invenustum | Obrium japonicum |
| Obrium kusamai | Obrium laosicum | Obrium laterale |
| Obrium lituratum | Obrium longicorne | Obrium longithoracicum |
| Obrium maculatum | Obrium moestum | Obrium mozinnae |
| Obrium multifarium | Obrium nakanei | Obrium nitidicolle |
| Obrium obliquum | Obrium oblongo-guttulum | Obrium oblongoguttulum |
| Obrium oculatum | Obrium pallidisignatum | Obrium pallidium |
| Obrium pallidum | Obrium peninsulare | Obrium piceorubrum |
| Obrium piperitum | Obrium planicolle | Obrium prosperum |
| Obrium pygmaeum | Obrium quadrifasciatum | Obrium rubidum |
| Obrium rubrum | Obrium ruficolle | Obrium rufograndum |
| Obrium rufulum | Obrium schwarzeri | Obrium takahashii |
| Obrium takeshitai | Obrium tavakiliani | Obrium translucidum |
| Obrium tricolor | Obrium trifasciatum | Obrium vicinum |
| Obrium xanthum | Obrivistyj Island | Obrnice |
| Obroatis | Obroatis chloropis | Obroatis columba |
| Obroatis cratinus | Obroatis curvilineata | Obroatis distincta |
| Obroatis ellops | Obroatis gatena | Obroatis humeralis |
| Obroatis licentiata | Obroatis negata | Obroatis nigriscripta |
| Obroatis ocellata | Obroatis reniplaga | Obroatis rhodocraspis |
| Obroatis rivularis | Obroatis roseipalpis | Obroatis rufa |
| Obroatis signata | Obroatis vinea | Obrochishhe |
| Obrogen Villa | Obrotjisjte | Obrovac |
| Obrovazzo | Obrovia | Obrovia neglecta |
| Obrsani | Obrsjani | Obrtka |
| Obručan | Obručan-Veli | Obruby |
| Obruchev | Obruchev Hills | Obruchev, Mount |
| Obrucheva, gora | Obrucheva, holmy | Obruchishhe |
| Obrussa | Obrussa ochrefasciella | Obruten mark |
| Obruten myt | Obrutjev, Vladimir | Obrutjisjte |
| Obrytbar ed | Obrytbara Eden | Obrytbara eden |
| Obryvistyj, ostrov | Obryzaceae | Obryzum |
| Obryzum corniculatum | Obryzum dolichoterum | Obryzum friesii |
| OBS | Obs | Obs (olika betydelser) |
| OBS (radioprogram) | Obs (ytmått) | OBS Kulturkvarten |
| OBS Magasin | Obs! | OBS! |
| Obs! (tidskrift) | OBS! Kulturkvarten | Obs! Stormarknad, Vårby |
| Obs-nur | Obscen | Obscenitet |
| Obscura | Obscura (band) | Obscura (musikgrupp) |
| Obscure | ObsCure | Obscure Alternatives |
| ObsCure II | Obscured by Clouds | Obscuria incerta |
| Obscuria spinicosta | Obscuriphantes | Obscuriphantes obscurus |
| Obscuriphantes pseudoobscurus | Obscuriphora | Obscuriphora sheppardi |
| Obscurodiscus | Obscurodiscus myricae | Obscuromyia |
| Obscuromyia westralica | Obscuropterus | Obscuropterus melanargyrea |
| Observabel | Observabel (kvantmekanik) | Observabler |
| Observanter | Observasjonsberget | Observatör |
| Observatör (designmönster) | Observatörsstatus i FN:s generalförsamling | Observation |
| Observation Bank | Observation Hill | Observation Island |
| Observation Island (ö i Antarktis) | Observation Island (ö i Kanada) | Observation Island, Antarktis |
| Observation Island, Nunavut | Observation Peak | Observation Peak (bergstopp i Kanada) |
| Observationell astronomi | Observationshumor | Observationskomik |
| Observationssats | Observatoire de Marseille | Observatoire de Paris |
| Observator | Observator (tidning) | Observatoriebacken |
| Observatorieberget | Observatorieberget, Saltsjöbaden | Observatoriegatan |
| Observatorieheia | Observatoriekullen | Observatorielunden |
| Observatoriemuseet | Observatorieparken, Uppsala | Observatorier |
| Observatoriet | Observatoriet Frostviken | Observatoriet i Berlin |
| Observatoriet i Greenwich | Observatoriet i Paris | Observatoriet i Slottsskogen |
| Observatorio | Observatorio Astronómico de La Plata | Observatorio Astronómico de La Sagra |
| Observatorio Island | Observatorium | Observatorium Robert Morris |
| Observatorium Tusculanum | Observatory Cay | Observatory Cay (ö i Australien, lat -21,02, long 154,38) |
| Observatory Cay (ö i Australien, lat -21,26, long 155,80) | Observatory Cay, Frederick Reefs | Observatory Cay, Kenn Reefs |
| Observatory Creek | Observatory Island | Observer |
| Observer AB | Observerbara universum | Obsessed |
| Obsession | Obsession (låt) | Obsession (musikalbum) |
| Obsession (sång) | Obsession: Radical Islam's War Against the West | Obsessive-compulsive disorder |
| Obshtina Aksakovo | Obshtina Alfatar | Obshtina Anton |
| Obshtina Antonovo | Obshtina Apriltsi | Obshtina Ardino |
| Obshtina Asenovgrad | Obshtina Avren | Obshtina Aytos |
| Obshtina Balchik | Obshtina Banite | Obshtina Bankya |
| Obshtina Bansko | Obshtina Batak | Obshtina Bela Slatina |
| Obshtina Belene | Obshtina Belitsa | Obshtina Belogradchik |
| Obshtina Beloslav | Obshtina Belovo | Obshtina Berkovitsa |
| Obshtina Blagoevgrad | Obshtina Boboshevo | Obshtina Bobovdol |
| Obshtina Bolyarovo | Obshtina Borino | Obshtina Borovan |
| Obshtina Borovo | Obshtina Botevgrad | Obshtina Boychinovtsi |
| Obshtina Boynitsa | Obshtina Bozhurishte | Obshtina Bratsigovo |
| Obshtina Bratya Daskalovi | Obshtina Bregovo | Obshtina Breznik |
| Obshtina Brezovo | Obshtina Brusartsi | Obshtina Buk’ovtsi |
| Obshtina Burgas | Obshtina Byala | Obshtina Byala Slatina |
| Obshtina Chavdar | Obshtina Chelopech | Obshtina Chepelare |
| Obshtina Chernoochene | Obshtina Cherven Bryag | Obshtina Chervena Zvezda |
| Obshtina Chiprovtsi | Obshtina Chirpan | Obshtina Chuprene |
| Obshtina Dŭlgopol | Obshtina Devin | Obshtina Devnya |
| Obshtina Dimitrovgrad | Obshtina Dimitrovo | Obshtina Dimovo |
| Obshtina Dobrich | Obshtina Dobrich-Selska | Obshtina Dolna Banya |
| Obshtina Dolna Mitropoliya | Obshtina Dolni Chiflik | Obshtina Dolni Dŭbnik |
