1. advocate a person who pleads for a person, cause, or idea
  2. advocacy active support of an idea or cause
  3. adversity a state of misfortune or affliction
  4. efficacy capacity or power to produce a desired result
  5. astrophysicist a scientist who studies the properties of celestial bodies
  6. narcissist someone who is excessively self-centered
  7. efficacious giving the power to produce an intended result
  8. efficaciousness capacity or power to produce a desired effect
  9. Adventist a member of Christian denomination that expects the imminent advent of Christ
  10. radio chassis a chassis for a radio receiver
  11. geophysicist a geologist who uses physical principles to study the properties of the earth
  12. biophysicist a physicist who applies the methods of physics to biology
  13. adverse in an opposing direction
  14. hydroxy acid any acid that has hydroxyl groups in addition to the hydroxyl group in the acid itself
  15. Antofagasta a port city on the Pacific in northern Chile
  16. atavist an organism that has the characteristics of a more primitive type of that organism
  17. gravity-assist (spaceflight) a trajectory that passes close to a planetary body in order to gain energy from its gravitational field
  18. actor's assistant a wardrobe assistant for an actor
  19. narcissism an exceptional interest in and admiration for yourself
  20. inefficaciousness a lack of efficacy