1. ethics motivation based on ideas of right and wrong
  2. Aztec a member of the Nahuatl people who established an empire in Mexico that was overthrown by Cortes in 1519
  3. Astacus type genus of the family Astacidae; Old World crayfish
  4. aesthetic characterized by an appreciation of beauty or good taste
  5. Aztecan the Uto-Aztecan language spoken by the Aztec
  6. aesthetics the branch of philosophy dealing with beauty and taste
  7. esoteric understandable only by an enlightened inner circle
  8. agnostic a person who claims the existence of God is unknowable
  9. paradox a statement that contradicts itself
  10. Astreus a genus of fungi belonging to the family Geastraceae
  11. ascetic someone who practices self denial as a spiritual discipline
  12. optics the branch of physics that studies the physical properties of light
  13. esthetics the branch of philosophy dealing with beauty and taste
  14. astute marked by practical hardheaded intelligence
  15. azotic of or containing nitrogen
  16. acoustics the study of the physical properties of sound
  17. aspect a characteristic to be considered
  18. aquatics sports that involve bodies of water
  19. ascites accumulation of serous fluid in peritoneal cavity
  20. isthmus a narrow strip of land connecting two larger land areas