science

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Across
  1. 1. reduce arousal and stimulation
  2. 3. pain reliever
  3. 4. increase alertness.
  4. 8. is a scientific discipline,
  5. 10. drugs derived from opium
  6. 11. loosely defined category of recreational drugs
Down
  1. 2. structurally related to testosterone
  2. 5. substances that are synthesized in a laboratory
  3. 6. are a series of physical and mental exercises
  4. 7. change the way people see, hear, taste, smell or feel,
  5. 9. physical dependence