Words starting with O that are validated

• ostracism — Noun – English ～ the act of excluding someone from society by general consent
• ostracize — Verb – English ～ expel from a community or group
• ostracize — Verb – English ～ avoid speaking to or dealing with; "Ever since I spoke up, my colleagues ostracize me"
• ostracod — Noun – English ～ tiny marine and freshwater crustaceans with a shrimp-like body enclosed in a bivalve shell
• Ostracoda — Noun – English ～ seed shrimps
• ostracoderm — Noun – English ～ extinct fish-like jawless vertebrate having a heavily armored body; of the Paleozoic
• order Ostracodermi — Noun – English ～ extinct group of armored jawless vertebrates; taxonomy is not clear
• Ostracodermi — Noun – English ～ extinct group of armored jawless vertebrates; taxonomy is not clear
• ostrava — Noun – English ～ an industrial city in northwestern Czech Republic in the Moravian lowlands; located in the coal mining area of Silesia
• Ostrea gigas — Noun – English ～ a large oyster native to Japan and introduced along the Pacific coast of the United States; a candidate for introduction in Chesapeake Bay
• ostrea — Noun – English ～ type genus of the family Ostreidae
• Ostreidae — Noun – English ～ oysters
• Ostri — Last name – Danish
• ostrich — Noun – English ～ fast-running African flightless bird with two-toed feet; largest living bird
• ostrich fern — Noun – English ～ tall fern of northern temperate regions having graceful arched fronds and sporophylls resembling ostrich plumes
• ostrich — Noun – English ～ a person who refuses to face reality or recognize the truth (a reference to the popular notion that the ostrich hides from danger by burying its head in the sand)
• Ostrogoth — Noun – English ～ a member of the eastern group of Goths who created a kingdom in northern Italy around 500 AD
• Ostrowski — Last name – Danish
• Ostrya carpinifolia — Noun – English ～ medium-sized hop hornbeam of southern Europe and Asia Minor
• Ostrya — Noun – English ～ deciduous monoecious trees of Europe and Asia and America; sometimes placed in subfamily or family Carpinaceae

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