Nouns in english starting with O

• obstructor — Noun – English ～ someone who systematically obstructs some action that others want to take
• obstructor — Noun – English ～ any structure that makes progress difficult
• obstruent — Noun – English ～ a consonant that is produced with a partial or complete blockage of the airflow from the lungs through the nose or mouth
• obtainment — Noun – English ～ the act of obtaining
• obtention — Noun – English ～ the act of obtaining
• obtrusiveness — Noun – English ～ an unwelcome conspicuousness
• obturator — Noun – English ～ a prosthesis used to close an opening (as to close an opening of the hard palate in cases of cleft palate)
• obtuse leaf — Noun – English ～ a simple leaf having a rounded or blunt tip
• obtuse angle — Noun – English ～ an angle between 90 and 180 degrees
• obtuseness — Noun – English ～ the quality of being slow to understand
• obtuseness — Noun – English ～ the quality of lacking a sharp edge or point
• obverse — Noun – English ～ the more conspicuous of two alternatives or cases or sides; "the obverse of this issue"
• obverse — Noun – English ～ the side of a coin or medal bearing the principal stamp or design
• obviation — Noun – English ～ the act of preventing something by anticipating and disposing of it effectively
• obviousness — Noun – English ～ the property of being easy to see and understand
• oca — Noun – English ～ South American wood sorrel cultivated for its edible tubers
• ocarina — Noun – English ～ egg-shaped terra cotta wind instrument with a mouthpiece and finger holes
• occam — Noun – English ～ English scholastic philosopher and assumed author of Occam's Razor (1285-1349)
• occasion — Noun – English ～ the time of a particular event; "on the occasion of his 60th birthday"
• occasion — Noun – English ～ an event that occurs at a critical time; "at such junctures he always had an impulse to leave"; "it was needed only on special occasions"

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