overdo - To do something in a way that is too extreme
optimize - To make the best and most effective use of a situation, opportunity, or resource.
outlandish - Foreign or unfamiliar, especially in a way that seems odd or eccentric.
obfuscate - To make something less clear and harder to understand, especially if done deliberately.
operational - Something that is in working order and ready for use.
ostracize - To banish someone socially, making them feel isolated or unwanted.
opportune - Happening at a time that is convenient or likely to produce success.
overbearing - Unpleasantly or arrogantly controlling.
ornery - Having an unpleasant mood or temper, likely to get angry and argue with people.
obstinate - Stubbornly refusing to change one's behavior or ideas
orchestrate - To organize a complicated plan or event very carefully
offshoot - Something that has developed from something larger that already existed
