1. authority the power or right to give orders or make decisions
  2. authorities the organization that is the governing authority of a political unit
  3. stereotype a conventional or formulaic conception or image
  4. authoritarian characteristic of an absolute ruler or absolute rule
  5. authoritative of recognized power or excellence
  6. autotype process for producing permanent prints in a carbon pigment
  7. authorship the act of creating written works
  8. water tap a faucet for drawing water from a pipe or cask
  9. austerity excessive sternness
  10. auditory tube either of the paired tubes connecting the middle ears to the nasopharynx; equalizes air pressure on the two sides of the eardrum
  11. atherodyde a simple type of jet engine; must be launched at high speed
  12. attrited worn by rubbing or friction
  13. autotypy process for producing permanent prints in a carbon pigment
  14. water table underground surface below which the ground is wholly saturated with water
  15. iterative marked by repetition
  16. water tower a large reservoir for water
  17. authorized sanctioned by established authority
  18. authorize grant permission or clearance for
  19. outrider an escort who rides ahead (as a member of the vanguard)
  20. authorised sanctioned by established authority