1. addition the arithmetic operation of summing
  2. audition perform in order to get a role
  3. edition the form in which a text is published
  4. adhesion the property of sticking together
  5. ideation the process of forming and relating thoughts
  6. addiction being dependent on something habit-forming
  7. adaption the process of adapting to something
  8. adoption proceeding creating a parent-child relation between persons
  9. radiation the act of spreading outward from a central source
  10. aviation the art of operating aircraft
  11. sedition an illegal action inciting resistance to lawful authority
  12. additional further or extra
  13. auction the public sale of something to the highest bidder
  14. tuition a fee paid for instruction, especially for higher education
  15. adduction moving of a body part toward the central axis of the body
  16. adoration the act of admiring strongly
  17. adulation exaggerated flattery or praise
  18. agitation a mental state of extreme emotional disturbance
  19. attrition the act of rubbing together
  20. erudition profound scholarly knowledge

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