| Orania adiastolos | Orania archaea | Orania archboldiana |
| Orania atea | Orania badia | Orania bimucronata |
| Orania birileffi | Orania corallina | Orania decipiens |
| Orania dharmai | Orania disticha | Orania ficula |
| Orania fischeriana | Orania fusulus | Orania gagavu |
| Orania gaskelli | Orania glauca | Orania infans |
| Orania lauterbachiana | Orania livida | Orania longisquama |
| Orania macropetala | Orania maestratii | Orania mixta |
| Orania moluccana | Orania nodosa | Orania nodulosa |
| Orania oreophila | Orania ornamentata | Orania pacifica |
| Orania palindan | Orania paraguanensis | Orania parva |
| Orania pholidota | Orania pleurotomoides | Orania purpurea |
| Orania ravaka | Orania regalis | Orania rosadoi |
| Orania rosea | Orania rubiginosa | Orania serotina |
| Orania simonetae | Orania subnodulosa | Orania sylvicola |
| Orania taeniata | Orania trispatha | Orania walkeri |
| Orania xuthedra | Oranienbaum, Đức | Oranienbaum, Germany |
| Oranienburg | Oraniopsis | Oraniopsis appendiculata |
| Oranjestad, Aruba | Oranjestad, Sint Eustatius | Oraphanes binotatum |
| Oraphasmophaga pictipennis | Oraprabandh Rambai | Oraprabandh Rambhai |
| Oras | Orastie | Orastioara de Sus |
| Orasturmia vallicola | Orasu Nou | Oratórios |
| Oratha | Oratha boreas | Oratha hypparia |
| Oratha parva | Oratha sericea | Oratha significata |
| Orathanadu (Mukthambalpuram) | Oratino | Orativ (huyện) |
| Oratostylum crenum | Oratostylum lepidum | Oratostylum zebra |
| Oravita | Orazio Michi | Oráčov |
| Orçay | Orègue | Orūzgān (tỉnh) |
| Orísoain | Orós | Orø |
| Orb | Orbagna | Orbais-l'Abbaye |
| Orbaitzeta | Orbamia | Orbamia ocellata |
| Orbamia octomaculata | Orbamia pauperata | Orbamia renimacula |
| Orbamia subaurata | Orban | Orban, Tarn |
| Orbaneja Riopico | Orbara | Orbasia |
| Orbassano | Orbányosfa | Orbe |
| Orbe (huyện) | Orbea | Orbea abayensis |
| Orbea ciliata | Orbea cooperi | Orbea decaisneana |
| Orbea denboefii | Orbea distincta | Orbea dummeri |
| Orbea huillensis | Orbea irrorata | Orbea lepida |
| Orbea longidens | Orbea lutea | Orbea macloughlinii |
| Orbea maculata | Orbea melanantha | Orbea namaquensis |
| Orbea paradoxa | Orbea prognatha | Orbea pulchella |
| Orbea rangeana | Orbea schweinfurthii | Orbea semota |
| Orbea tapscottii | Orbea umbracula | Orbea variegata |
| Orbea verrucosa | Orbea wendlandiana | Orbea woodii |
| Orbeanthus | Orbeanthus conjunctus | Orbeanthus hardyi |
| Orbeasca | Orbec | Orbec (tổng) |
| Orbeil | Orbeni | Orbeopsis |
| Orbeopsis albocastanea | Orbeopsis gerstneri | Orbeopsis knobelii |
| Orbeopsis melanantha | Orbeopsis valida | Orbessan |
| Orbetello | Orbexilum | Orbexilum gracile |
| Orbexilum lupinellum | Orbexilum melanocarpum | Orbexilum virgatum |
| Orbey | Orbifrons | Orbigny, Indre-et-Loire |
| Orbigny-au-Mont | Orbigny-au-Val | Orbimorphus constrictus |
| Orbione angusta | Orbione aristei | Orbione bonnieri |
| Orbione digitata | Orbione halipori | Orbione izuensis |
| Orbione penei | Orbione thielemanni | Orbis |
| Orbis, Donnersberg | Orbisonia, Pennsylvania | Orbit Downloader |
| Orbita, Tây Ban Nha | Orbital | Orbital nguyên tử |
| Orbital Sciences X-34 | Orbitan nguyên tử | Orbiting Carbon Observatory |
| Orbona (bướm đêm) | Orbona fragariae | Orc |
| Orca | OrCAD | Orcaella |
| Orcaella brevirostris | Orcaella heinsohni | Orcajo |
| Orce | Orcemont | Orcenais |
| Orcera | Orcesis affinis | Orcesis fuscoapicalis |
| Orcesis ochreosignata | Orcesis phauloides | Orcesis unicolor |
| Orcesis variegata | Orcet | Orcevaux |
| Orcevia | Orchaise | Orchamoplatus caledonicus |
| Orchamoplatus calophylli | Orchamoplatus citri | Orchamoplatus dentatus |
| Orchamoplatus dumbletoni | Orchamoplatus incognitus | Orchamoplatus louiserussellae |
| Orchamoplatus mammaeferus | Orchamoplatus montanus | Orchamoplatus niuginii |
| Orchamoplatus noumeae | Orchamoplatus perdentatus | Orchamoplatus plumensis |
| Orchamoplatus porosus | Orchamps | Orchamps-Vennes |
| Orchard, Iowa | Orchard, Quận Wayne, Illinois | Orchard, Texas |
| Orches | Orchesia affinis | Orchesia alphabetica |
| Orchesia angustata | Orchesia arnoldii | Orchesia austrina |
| Orchesia biroi | Orchesia blandula | Orchesia brasiliensis |
| Orchesia bryophila | Orchesia calotricha | Orchesia castanea |
| Orchesia cultriformis | Orchesia diversenotata | Orchesia duplicata |
| Orchesia elegantula | Orchesia elongata | Orchesia eucalypti |
| Orchesia fasciata | Orchesia fasciolata | Orchesia filicornis |
| Orchesia fumosa | Orchesia fusca | Orchesia fusiformis |
| Orchesia gracilis | Orchesia grandicollis | Orchesia gravida |
| Orchesia guatemalensis | Orchesia imitans | Orchesia kamberskyi |
| Orchesia keili | Orchesia lucida | Orchesia luteipalpis |
| Orchesia macilenta | Orchesia macleayi | Orchesia maculata |
| Orchesia marseuli | Orchesia medioflava | Orchesia micans |
| Orchesia minima | Orchesia minor | Orchesia minuta |
| Orchesia multinotata | Orchesia multisignata | Orchesia nigra |
| Orchesia obscuricolor | Orchesia ocularis | Orchesia ornata |
| Orchesia ovata | Orchesia pallidior | Orchesia parvula |
| Orchesia piceofasciata | Orchesia picta | Orchesia pictipennis |
| Orchesia posticalis | Orchesia rennelli | Orchesia undulata |
| Orchesia wellingtoniana | Orchesticus | Orchesticus abeillei |
| Orchestina | Orchestina aerumnae | Orchestina algerica |
| Orchestina arabica | Orchestina bedu | Orchestina cincta |
| Orchestina codalmasi | Orchestina dalmasi | Orchestina dentifera |
| Orchestina dubia | Orchestina ebriola | Orchestina elegans |
| Orchestina flagella | Orchestina flava | Orchestina foa |
| Orchestina furcillata | Orchestina hammamali | Orchestina justini |
