1. proactive causing something to happen rather than waiting to respond
  2. precative expressing entreaty or supplication
  3. purgative strongly laxative
  4. productive capable of bringing forth, especially abundantly
  5. protective intended or adapted to provide safety of some kind
  6. probative tending to prove a particular proposition or to persuade you of the truth of an allegation
  7. promotive tending to further or encourage
  8. practice a customary way of operation or behavior
  9. practise engage in a rehearsal (of)
  10. reactive participating in processes changing substances into others
  11. tractive exerting traction and serving to pull
  12. perfective a tense of verbs used in describing action that has been completed (sometimes regarded as perfective aspect)
  13. predictive of or relating to prediction
  14. be active be in a state of action
  15. fricative a continuant consonant produced by breath moving against a narrowing of the vocal tract
  16. placative intended to pacify by acceding to demands or granting concessions
  17. primitive characteristic of an earlier ancestral type
  18. deprecative tending to diminish or disparage
  19. hyperactive more engaged than normal
  20. prerogative a right reserved exclusively by a person or group

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