Words starting with O
- -ology English, suffix
- -or English, suffix
- -os Proto-Italic, suffix
- -ot Polish, suffix
- -ous English, suffix
- obfity Polish, adj
- oblivion English, noun
- oblivion Middle English, noun
- obnoxious English, adj
- obscure English, adj
- obszar Polish, noun
- obtuse English, adj
- ocean English, noun
- ocho Asturian, num
- ocho Spanish, num
- ocho Spanish, noun
- ocht Irish, num
- octal English, noun
- octo Latin, num
- océan French, noun
- ode English, noun
- oeuf English, noun
- offen German, adj
- oi Portuguese, intj
- oito Galician, num
- oito Portuguese, num
- ojo Spanish, noun
- OK English, adj
- ok Esperanto, num
- ol English, adj
- oliphant English, noun
- ombre English, noun
- omm Maltese, noun
- on Turkish, num
- one English, num
- one English, noun
- one English, particle
- onion English, noun
- onomatopeya Spanish, noun
- onyx English, noun
- oordeel Dutch, noun
- opaque English, adj
- open Dutch, adj
- open English, adj
- opt Romanian, num
- Oran English, name
- Oran Polish, name
- orang-outan French, noun
- orange English, noun
- orange English, adj
- orange English, verb
- Orange English, name
- orange French, noun
- orange French, adj
- Orange German, noun
- orange-throated whiptail English, noun
- orangutan English, noun
- orangután Spanish, noun
- oranje Afrikaans, adj
- oranje Dutch, adj
- oransje Norwegian Bokmål, adj
- oranye Indonesian, adj
- oranĝo Esperanto, noun
- orchard English, noun
- orchidee Dutch, noun
- orchidée French, noun
- ordeal English, noun
- ordinateur French, noun
- oregano English, noun
- Oregon English, name
- oreille French, noun
- orejón Spanish, adj
- orifice French, noun
- orina Spanish, noun
- oriole English, noun
- oriṣa Yoruba, noun
- Orkxit English, name
- ornitho- English, prefix
- ornithology English, noun
- orphan English, noun
- orthographe French, noun
- orthoped English, noun
- osam Serbo-Croatian, num
- oseille French, noun
- osiem Polish, num
- osioł Polish, noun
- osm Czech, num
- Osten German, noun
- ostracize English, verb
- ostrich English, noun
- ostrich Middle English, noun
- otarie French, noun
- otorhinolaryngology English, noun
- otte Danish, num
- otto Italian, num
- otto Italian, noun
- Ouija English, noun
- ouragan French, noun
- out English, adj
- ouzel English, noun
- oven English, noun
- over English, adj
- over English, adv
- oyster English, noun
- oändlig Swedish, adj
- oíche Irish, noun
- oḱtṓw Proto-Indo-European, num
- öppen Swedish, adj
- öt Hungarian, num
- öönikka Ingrian, noun
Etymology data from Wiktionary, CC BY-SA 4.0 · About Miraris