| Orchis militaris | Orchis militaris militaris | Orchis militaris stevenii |
| Orchis olbiensis | Orchis palanchonii | Orchis pallens |
| Orchis patens | Orchis patens canariensis | Orchis patens patens |
| Orchis pauciflora | Orchis penzigiana | Orchis permixta |
| Orchis petterssonii | Orchis picta | Orchis plessidiaca |
| Orchis provincialis | Orchis pseudoanatolica | Orchis punctulata |
| Orchis purpurea | Orchis purpurea caucasica | Orchis purpurea purpurea |
| Orchis quadripunctata | Orchis rassautae | Orchis roborowskii |
| Orchis serraniana | Orchis sezikiana | Orchis simia |
| Orchis simia simia | Orchis simia taubertiana | Orchis sitiaca |
| Orchis spitzelii | Orchis spitzelii cazorlensis | Orchis spitzelii nitidifolia |
| Orchis spitzelii spitzelii | Orchis spuria | Orchis stevenii |
| Orchis subpatens | Orchis thriftiensis | Orchis tochniana |
| Orchis troodi | Orchis viride-fusca | Orchis willingiorum |
| Orchis wulffiana | Orchiserapias | Orchiserapias cytherea |
| Orchiserapias triloba | Orchithemis pruinans | Orchithemis pulcherrima |
| Orchithemis xanthosoma | Orchomenos | Orci |
| Orciano di Pesaro | Orciano Pisano | Orcières |
| Orcières (tổng) | ORCID | Orcier |
| Orcinas | Orcines | Orcinus |
| Orcinus orca | Orcival | Orco Feglino |
| Orcomimus | Orconectes | Orconectes bisectus |
| Orconectes blacki | Orconectes cooperi | Orconectes deanae |
| Orconectes hartfieldi | Orconectes holti | Orconectes incomptus |
| Orconectes jeffersoni | Orconectes jonesi | Orconectes kentuckiensis |
| Orconectes maletae | Orconectes marchandi | Orconectes menae |
| Orconectes mississippiensis | Orconectes peruncus | Orconectes quadruncus |
| Orconectes saxatilis | Orconectes shoupi | Orconectes sloanii |
| Orconectes stannardi | Orconectes wrighti | Orconte |
| Orcoyen | Orcus | Orcuttia |
| Orcuttia californica | Orcuttia inaequalis | Orcuttia pilosa |
| Orcuttia tenuis | Orcuttia viscida | Orcya |
| Orcynia calcarata | ORD | Ordacsehi |
| Ordan-Larroque | Ordas | Order of Victory |
| Order of War | Order of War: Challenge | Ordes |
| Ordgarius | Ordgarius acanthonotus | Ordgarius bicolor |
| Ordgarius clypeatus | Ordgarius ephippiatus | Ordgarius furcatus |
| Ordgarius furcatus distinctus | Ordgarius hexaspinus | Ordgarius hobsoni |
| Ordgarius magnificus | Ordgarius monstrosus | Ordgarius pustulosus |
| Ordgarius sexspinosus | Ordiarp | Ordinance Factory Itarsi |
| Ordinary Girl | Ordinsky (huyện) | Ordis |
| Ordishia albofasciata | Ordishia cingulata | Ordishia clagesi |
| Ordishia fafner | Ordishia godmani | Ordishia klagesi |
| Ordishia rutilus | Ordishia striata | Ordizan |
| Ordizia | Ordnance Factory Muradnagar | Ordobrevia amamiensis |
| Ordobrevia communis | Ordobrevia constricta | Ordobrevia flavolineata |
| Ordobrevia fletcheri | Ordobrevia foveicollis | Ordobrevia gotoi |
| Ordobrevia hafizi | Ordobrevia longicollis | Ordobrevia maculata |
| Ordobrevia nubifera | Ordobrevia reflexicollis | Ordobrevia testacea |
| Ordona | Ordonnac | Ordonnaz |
| Ordos | Ordos (địa cấp thị) | Ordos (thành phố) |
| Ordovic giữa | Ordovic muộn | Ordovic sớm |
| Ordovician | Ordre du Dragon d' Annam | Ordre national de la Légion d’honneur |
| Ordu | Ordu (tỉnh) | Ordu, Sinop |
| Ordubaşı, Çarşamba | Ordubad (quận) | Orduköy, Çarşamba |
| Ordular, Mudurnu | Ordulukaradere, Cumayeri | Orduzu, Malatya |
| Ordynsky (huyện) | Ordzhonikidze | Ordzhonikidze, Ukraina |
| Ordzhonikidzevsky (huyện) | Ore City, Texas | Ore wa Teppei |
| Ore, Haute-Garonne | Ore, Twintails ni Narimasu!! | Orea |
| Oread | Oreades lativentris | Oreaeschna dictatrix |
| Oreaeschna dominatrix | Oreagrion armeniacum | Oreagrion lorentzi |
| Oreagrion oreadum | Oreagrion pectingi | Oreagrion xanthocyane |
| Oreamnos | Oreamnos americanus | Oreamuno (tổng) |
| Oreana, Illinois | Oreanthes buxifolius | Oreanthes ecuadorensis |
| Oreanthes fragilis | Oreanthes glanduliferus | Oreanthes hypogaeus |
| Oreanthes rotundifolius | Oreanthes sperlingii | Oreas |
| Oreas elongata | Oreas erecta | Oreas martiana |
| Oreas mexicana | OREC | Orecta |
| Orecta acuminata | Orecta fruhstorferi | Orecta lycidas |
| Orecta venedictoffae | Orectanthe | Orectanthe ptaritepuiana |
| Orectanthe sceptrum | Orectis | Orectis barteli |
| Orectis euprepiata | Orectis massiliensis | Orectis proboscidata |
| Orectochilini | Orectochilus | Orectochilus acuductus |
| Orectochilus acutilobus | Orectochilus aeneipennis | Orectochilus afghanus |
| Orectochilus africanus | Orectochilus agilis | Orectochilus agnatus |
| Orectochilus ahlwarthi | Orectochilus alienus | Orectochilus andamanicus |
| Orectochilus angulatus | Orectochilus angusticinctus | Orectochilus annandalei |
| Orectochilus apicalis | Orectochilus archipelagensis | Orectochilus argenteolimbatus |
| Orectochilus assequens | Orectochilus assimilis | Orectochilus baeri |
| Orectochilus bakeri | Orectochilus bataviensis | Orectochilus bicolor |
| Orectochilus biformis | Orectochilus bipartitus | Orectochilus birmanicus |
| Orectochilus boettcheri | Orectochilus brevidens | Orectochilus brevitarsis |
| Orectochilus brincki | Orectochilus caliginosus | Orectochilus cameroni |
| Orectochilus cardiophorus | Orectochilus cardoni | Orectochilus castaneus |
| Orectochilus castetsi | Orectochilus cavernicola | Orectochilus celebensis |
| Orectochilus chalceus | Orectochilus chinensis | Orectochilus choprai |
| Orectochilus coimbatorensis | Orectochilus compressus | Orectochilus conspicuus |
| Orectochilus coomani | Orectochilus cordatus | Orectochilus corniger |
| Orectochilus corporaali | Orectochilus corpulentus | Orectochilus crassipes |
| Orectochilus cribratellus | Orectochilus cuneatus | Orectochilus cupreolus |
| Orectochilus cylindricus | Orectochilus dehiscens | Orectochilus depressiusculus |
| Orectochilus desgodinsi | Orectochilus dilatatus | Orectochilus discifer |
| Orectochilus discus | Orectochilus dispar | Orectochilus distinguendus |
| Orectochilus divergens | Orectochilus drescheri | Orectochilus dulitensis |
| Orectochilus eberti | Orectochilus emmerichi | Orectochilus fairmairei |
| Orectochilus fallax | Orectochilus feae | Orectochilus ferruginicollis |
| Orectochilus figuratus | Orectochilus fletcheri | Orectochilus florensis |
| Orectochilus foersteri | Orectochilus formosanus | Orectochilus fraternus |
| Orectochilus fruhstorferi | Orectochilus fusiformis | Orectochilus gangeticus |
| Orectochilus gestroi | Orectochilus grandipes | Orectochilus haemorrhous |
