Words starting with O

• out-performed – not validated
• over-performer – not validated
• out-performing – not validated
• Ordovician period — Noun – English ～ from 500 million to 425 million years ago; conodonts and ostracods and algae and seaweeds
• orbit period — Noun – English ～ the time it takes to complete one full orbit around a celestial body; "the orbit period depends on the altitude of the satellite"
• overtime period — Noun – English ～ a period of overtime play to resolve a tie; e.g. basketball
• ol-periode – not validated
• obama-perioden – not validated
• ol-perioden – not validated
• opstarts-perioder – not validated
• order Perissodactyla — Noun – English ～ nonruminant ungulates: horses; tapirs; rhinoceros; extinct forms
• order Peronosporales — Noun – English ～ order of chiefly parasitic lower fungi: Albuginaceae and Peronosporaceae and Pythiaceae
• Oliver Hazard Perry — Noun – English ～ United States commodore who led the fleet that defeated the British on Lake Erie during the War of 1812; brother of Matthew Calbraith Perry (1785-1819)
• ornery-old-person – not validated
• old person — Noun – English ～ an elderly person
• one-person — Adjective – English ～ designed for or restricted to a single person; "a one-man show"; "a one-person tent"; "Sarah Silverman's hilarious one-woman show"
• organisation/person – not validated
• online-persona – not validated
• oral personality — Noun – English ～ (psychoanalysis) a personality characterized either by generous optimism or aggressive and ambitious selfishness; formed in early childhood by fixation during the oral stage of development
• obsessive-compulsive personality — Noun – English ～ personality characterized by a strong need to repeat certain acts or rituals

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