Words in english starting with O

• opossum — Noun – English ～ small furry Australian arboreal marsupials having long usually prehensile tails
• opossum — Noun – English ～ nocturnal arboreal marsupial having a naked prehensile tail found from southern North America to northern South America
• oppenheimer — Noun – English ～ United States physicist who directed the project at Los Alamos that developed the first atomic bomb (1904-1967)
• opponent — Noun – English ～ a contestant that you are matched against
• opponent — Noun – English ～ someone who offers opposition
• opponent — Adjective – English ～ characterized by active hostility; "opponent (or opposing) armies"
• opportune — Adjective – English ～ suitable or at a time that is suitable or advantageous especially for a particular purpose; "an opportune place to make camp"; "an opportune arrival"; "an opportune time to receive guests"
• opportunely — Adverb – English ～ at an opportune time; "he arrived rather opportunely just when we needed a new butler"
• opportuneness — Noun – English ～ timely convenience
• opportunism — Noun – English ～ taking advantage of opportunities without regard for the consequences for others
• opportunist — Noun – English ～ a person who places expediency above principle
• opportunist — Adjective – English ～ taking immediate advantage, often unethically, of any circumstance of possible benefit
• opportunistic infection — Noun – English ～ any infection caused by a microorganism that does not normally cause disease in humans; occurs in persons with abnormally functioning immune systems (as AIDS patients or transplant patients receiving immunosuppressive drugs)
• opportunistic — Adjective – English ～ taking immediate advantage, often unethically, of any circumstance of possible benefit
• opportunity — Noun – English ～ a possibility due to a favorable combination of circumstances; "the holiday gave us the opportunity to visit Washington"; "now is your chance"
• opportunity cost — Noun – English ～ cost in terms of foregoing alternatives
• opposable — Adjective – English ～ capable of being placed opposite to something; "the thumb is opposable to the forefinger"
• oppose — Verb – English ～ be against; express opposition to; "We oppose the ban on abortion"
• oppose — Verb – English ～ act against or in opposition to; "She reacts negatively to everything I say"
• oppose — Verb – English ～ be resistant to; "The board opposed his motion"

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