| Oroscopa punctata | Oroscopa sphragis | Oroscopa taenaria |
| Oroscopa variegata | Orosei | Orosh |
| Orosháza | Oroso | Orostachys |
| Orostachys aggregata | Orostachys cartilaginea | Orostachys chanetii |
| Orostachys fimbriata | Orostachys iwarenge | Orostachys japonica |
| Orostachys malacophylla | Orostachys malacophylla malacophylla | Orostachys minuta |
| Orostachys paradoxa | Orostachys sikokiana | Orostachys spinosa |
| Orostachys thyrsiflora | Oroszi | Oroszlány |
| Oroszló | Orosztony | Orotelli |
| Orotermes | Orotermes monstrosa | Orothalassodes |
| Orothalassodes falsaria | Orotina (tổng) | Orotylus mitis |
| Oroussetia distincta | Oroussetia hirta | Oroussetia philippinensis |
| Oroussetia pubescens | Oroussetia punctata | Oroux |
| Oroxenofrea spiculata | Oroxylum indicum | Oroya baumannii |
| Oroya borchersii | Oroya peruviana | Oroz-Betelu |
| ORP Ślązak (L26) | ORP Generał Kazimierz Pułaski | ORP Krakowiak (L115) |
| ORP Kujawiak (L72) | ORP Orkan | ORP Orkan (G90) |
| ORP Piorun (G65) | Orp-Jauche | Orphan (phim) |
| Orphana inquirenda | Orphana wagenknechti | Orphanodendron |
| Orphanodendron bernalii | Orphanodendron bernatii | Orphanostigma |
| Orphanostigma abruptalis | Orphanostigma excisa | Orphanostigma vibiusalis |
| Orphe | Orphelana perplexa | Orpheum theater (Los Angeles) |
| Orpheus | Orpheus in the Underworld | Orpheus và Euridice |
| Orphilinae | Orphilodes australis | Orphilodes malleecola |
| Orphilodes minor | Orphilus | Orphilus africanus |
| Orphilus ater | Orphilus beali | Orphilus dubius |
| Orphilus niger | Orphilus subnitidus | Orphin |
| Orphinus aethiops | Orphinus affinis | Orphinus africanus |
| Orphinus apicalis | Orphinus apicebrunneus | Orphinus atrofasciatus |
| Orphinus atrous | Orphinus australicus | Orphinus bicolor |
| Orphinus biflexus | Orphinus binotatus | Orphinus bipunctutus |
| Orphinus biroi | Orphinus casuarinae | Orphinus ceciliense |
| Orphinus chinensis | Orphinus congoanus | Orphinus conjunctus |
| Orphinus convexus | Orphinus defectus | Orphinus demeyeri |
| Orphinus diversus | Orphinus fasciatus | Orphinus fouqueti |
| Orphinus fulvipes | Orphinus funestus | Orphinus globulicornis |
| Orphinus guernei | Orphinus haemorrhoidalis | Orphinus hartmanni |
| Orphinus horni | Orphinus incognitus | Orphinus infasciatus |
| Orphinus interioris | Orphinus japonicus | Orphinus jiri |
| Orphinus jucundus | Orphinus kabateki | Orphinus katerina |
| Orphinus kejvali | Orphinus kenyensis | Orphinus kresli |
| Orphinus malabarensis | Orphinus mediojunctus | Orphinus minimus |
| Orphinus minor | Orphinus mroczkowskii | Orphinus nealense |
| Orphinus nesioticus | Orphinus nilgirensis | Orphinus notaticollis |
| Orphinus obliteratus | Orphinus occidentalis | Orphinus okinawanus |
| Orphinus orientalis | Orphinus oscitans | Orphinus ovalis |
| Orphinus pedestris | Orphinus pseudoovalis | Orphinus quadrimaculatus |
| Orphinus quornensis | Orphinus rufofasciatus | Orphinus rusumoensis |
| Orphinus sexmaculatus | Orphinus sikkimensis | Orphinus subfasciatus |
| Orphinus tabitha | Orphinus tadzhicus | Orphinus terminalis |
| Orphinus testaceipes | Orphinus tonkineus | Orphinus unifasciatus |
| Orphinus wagneri | Orphinus woodvillensis | Orphinus yunnanus |
| Orphinus zomba | Orphium frutescens | Orphnaecus |
| Orphnaecus pellitus | Orphnodula argyrosterna | Orphnophanes |
| Orphnophanes ankarampotsyalis | Orphnophanes ankarapotsyalis | Orphnophanes eucerusalis |
| Orphnophanes laevalis | Orphnophanes thoasalis | Orphnophanes turbatalis |
| Orpierre | Orpierre (tổng) | Orquevaux |
| Orr, Minnesota | Orrea | Orret |
| Orrhodia | Orrhodiella | Orrhodops americanus |
| Orrhodops occidentalis | Orrhynchites comosellus | Orria |
| Orrick, Quận Ray, Missouri | Orrios | Orriule |
| Orrmaesia | Orrmaesia dorsicosta | Orrmaesia nucella |
| Orroli | Orrorin | Orrorin tugenensis |
| Orrouer | Orrouy | Orrstown, Pennsylvania |
| Orrville, Alabama | Orrville, Ohio | Orry-la-Ville |
| Ors | Orsa (đô thị) | Orsa (bướm đêm) |
| Orsa bilineatus | Orsa deleta | Orsa erythrospila |
| Orsa orbifera | Orsa rufitibia | Orsago |
| Orsan | Orsanco | Orsans, Aude |
| Orsans, Doubs | Orsara Bormida | Orsara di Puglia |
| Orsay | Orschwihr | Orschwiller |
| Orsenigo | Orsennes | Orses |
| Orsfeld | Orshansky (huyện) | Orsidis acutipennis |
| Orsidis andamanensis | Orsidis flavosticticus | Orsidis privatus |
| Orsidis proletarius | Orsidis singaporensis | Orsima |
| Orsima constricta | Orsima ichneumon | Orsinome |
| Orsinome armata | Orsinome cavernicola | Orsinome daiqin |
| Orsinome diporusa | Orsinome elberti | Orsinome jiarui |
| Orsinome lagenifera | Orsinome listeri | Orsinome lorentzi |
| Orsinome marmorea | Orsinome monulfi | Orsinome phrygiana |
| Orsinome pilatrix | Orsinome sarasini | Orsinome trappensis |
| Orsinome vethi | Orsinome vorkampiana | Orsinval |
| ORSIS T-5000 | Orsk | Orsocoma macrogona |
| Orsodacne | Orsodacninae | Orsolobidae |
| Orsolobus | Orsolobus chelifer | Orsolobus chilensis |
| Orsolobus mapocho | Orsolobus montt | Orsolobus plenus |
| Orsolobus pucara | Orsolobus pucatrihue | Orsolobus schlingeri |
| Orsolobus singularis | Orson Welles | Orsonnette |
| Orsonoba | Orsonville | Orsonwelles |
| Orsonwelles ambersonorum | Orsonwelles arcanus | Orsonwelles bellum |
| Orsonwelles calx | Orsonwelles falstaffius | Orsonwelles graphicus |
| Orsonwelles iudicium | Orsonwelles macbeth | Orsonwelles malus |
| Orsonwelles othello | Orsonwelles polites | Orsonwelles torosus |
| Orsonwelles ventus | Orsova | Orstom |
| Orstom aoupinie | Orstom chazeaui | Orstom hydratemei |
| Orstom macmillani | Orstom tropicus | Orstom undecimatus |
| Orstomaleyrodes fimbriae | Ort im Innkreis | Orta Bostancı, Suruç |
| Orta di Atella | Orta Fatmacık, Birecik | Orta Nova |
| Orta, Çankırı | Orta, Taşköprü | Orta, Vezirköprü |
| Ortaağaç, Ergani | Ortaalan, Akçaabat | Ortaalan, Ardeşen |
