1. obstacle race a race in which competitors must negotiate obstacles
  2. bicycle race a race between people riding bicycles
  3. obstacle something that stands in the way and must be surmounted
  4. obstreperous noisily and stubbornly defiant
  5. stake race a horse race in which part of the prize is put up by the owners of the horses in the race
  6. obstetrics the branch of medicine dealing with childbirth and care of the mother
  7. abstruse difficult to penetrate
  8. upstager a selfish actor who upstages the other actors
  9. obstetric of or relating to or used in or practicing obstetrics
  10. particularise be specific about
  11. particularize be specific about
  12. Roystonea oleracea West Indian palm with leaf buds that are edible when young
  13. upset price (auction) the minimum price at which a seller of property will entertain bids
  14. abstinence the trait of refraining from something, especially alcohol
  15. abstracter one who makes abstracts or summarizes information
  16. obstinance resolute adherence to your own ideas or desires
  17. obstructer someone who systematically obstructs some action that others want to take
  18. abstract art an abstract genre of art
  19. upstairs on a floor above
  20. abstainer a person who refrains from drinking intoxicating beverages

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