1. available obtainable or accessible and ready for use or service
  2. unavailable not accessible or at hand
  3. invaluable having incalculable monetary or intellectual worth
  4. irrevocable incapable of being retracted
  5. travelable capable of being traversed
  6. infallible incapable of failure or error
  7. inviolable incapable of being transgressed or dishonored
  8. irrevocably in a manner that cannot be taken back
  9. reliable able to be depended on; consistent or steady
  10. irrevokable incapable of being retracted or revoked
  11. amiable diffusing warmth and friendliness
  12. irrefutable impossible to deny or disprove
  13. affable diffusing warmth and friendliness
  14. assailable vulnerable to attack
  15. irreclaimable insusceptible of reform
  16. unassailable impossible to attack
  17. aerophilately the collection and study of airmail stamps
  18. irreplaceable impossible to substitute for
  19. irreconcilable impossible to bring into accord
  20. irrecoverable incapable of being recovered or regained