1. ABC the elementary stages of any subject (usually plural)
  2. abaca Philippine banana tree having leafstalks that yield Manila hemp used for rope and paper etc
  3. aback by surprise
  4. APC a drug combination found in some over-the-counter headache remedies (aspirin and phenacetin and caffeine)
  5. apache a Parisian gangster
  6. apogee the farthest point in an orbit around the Earth
  7. Apache any member of Athapaskan tribes that migrated to the southwestern desert (from Arizona to Texas and south into Mexico); fought a losing battle from 1861 to 1886 with the United States and were resettled in Oklahoma
  8. Ubykh an extinct Caucasian language spoken exclusively in Turkey
  9. epic a long narrative poem telling of a hero's deeds
  10. OPEC an organization of countries formed in 1961 to agree on a common policy for the production and sale of petroleum
  11. Epigaea small creeping evergreen shrubs: trailing arbutus
  12. obeche large west African tree having large palmately lobed leaves and axillary cymose panicles of small white flowers and one-winged seeds; yields soft white to pale yellow wood
  13. obechi large west African tree having large palmately lobed leaves and axillary cymose panicles of small white flowers and one-winged seeds; yields soft white to pale yellow wood
  14. opaque not transmitting or reflecting light or radiant energy
  15. epoch a period marked by distinctive character
  16. aboulic suffering from abulia
  17. air bag a safety restraint in an automobile
  18. apnoeic of or relating to apnea
  19. a bit to a small degree; somewhat
  20. OPCW international organization for chemical disarmament

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