1. instant a very short time
  2. instance an item of information that is typical of a class or group
  3. instantly without delay or hesitation; with no time intervening
  4. instigate provoke or stir up
  5. constant uninterrupted in time and indefinitely long continuing
  6. instantiate represent by a specific example
  7. instinct inborn pattern of behavior often responsive to stimuli
  8. incident a single distinct event
  9. unstained not stained
  10. instancy the quickness of action or occurrence
  11. institute set up or lay the groundwork for
  12. unstinted very generous
  13. instigant someone who deliberately foments trouble
  14. inkstand a small well holding writing ink into which a pen can be dipped
  15. insistent demanding attention
  16. andante at a moderately slow tempo
  17. insulant a material that reduces or prevents the transmission of heat or sound or electricity
  18. extant still in existence; not extinct or destroyed or lost
  19. unstated not made explicit
  20. antecedent a preceding occurrence or cause or event