Pro- Retro- an- anti-

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Across
  1. 3. a forward moving object that was thrown
  2. 4. likely to move
  3. 5. the cause to move forward
  4. 6. a medicine that works against colds
  5. 10. a substance that works against stomach acid
  6. 12. to go back and install something that wasn't available at that time
  7. 13. to move forward
  8. 15. a word that means the opposite of the word
Down
  1. 1. to forward a complant
  2. 2. related to the past
  3. 3. to draw out
  4. 7. designed to fight Against or kill bacteria
  5. 8. a remedy or cure
  6. 9. goes back to a prior time
  7. 11. a better position at a job
  8. 14. the act of looking forward to something